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東北大学 研究者紹介 TOHOKU UNIVERSITY Researchers 東北大学 研究者紹介 --> Details of the Researcher 検索結果一覧に戻る --> Home 日本語 English   TOHOKU UNIVERSITY Researchers Menu Japanese Page TOHOKU University Web Top Page Summary ◆ Profile ◆ Research History ◆ Education ◆ Committee Memberships ◆ Professional Memberships Research Activities ◆ Research Interests ◆ Research Areas ◆ Awards ◆ Papers ◆ Misc. ◆ Books and Other Publications ◆ Presentations ◆ Industrial Property Rights ◆ Research Projects Educational Activities ◆ Teaching Experience Contributions ◆ Social Activities ◆ Media Coverage ◆ Academic Activities Other ◆ Other × ​ Summary Profile Research History Education Committee Memberships Professional Memberships ​ Research Activities Research Interests Research Areas Awards Papers Misc. Books and Other Publications Presentations Industrial Property Rights Research Projects ​ Educational Activities Teaching Experience ​ Contributions Social Activities Media Coverage Academic Activities ​ Other Other Nobuaki Terakado Section Graduate School of Engineering Job title Associate Professor Degree 博士（工学）（北海道大学） 修士（工学）（北海道大学） researchmap https://researchmap.jp/7000012565 J-GLOBAL ID 201501006169402080 ORCID https://orcid.org/0000-0002-7291-8828 Research History 5 2023/09 - Present Tohoku University　Graduate School of Engineering Department of Applied Physics 2014/04 - Present Tohoku University　Department of Applied Physics　Assistant Professor 2018/10 - 2022/03 JST　PRESTO　Researcher 2011/04 - 2014/03 グエラテクノロジー株式会社　主任研究員 2007/10 - 2011/03 北海道大学　大学院工学研究科 応用物理学専攻　学術研究員 Education 3 Hokkaido University　Graduate School, Division of Engineering　Department of Applied Physics 2002/04 - 2007/09 Hokkaido University　Faculty of Engineering　Division of Applied Physics 1998/04 - 2002/03 栃木県立佐野高等学校 1995/04 - 1998/03 Committee Memberships 7 応用物理学会東北支部　庶務幹事 2018/04 - 2020/03 応用物理学会東北支部　第74回東北支部学術講演会 実行委員 2019/12 - 2019/12 第57回セラミックス基礎科学討論会　現地実行委員・会計幹事 2019/01 - 2019/01 応用物理学会東北支部 第73回東北支部学術講演会　現地実行委員 2018/12 - 2018/12 日本セラミックス協会ガラス部会 若手セミナー幹事 2014/04 - 2015/03 応用物理学会フォトニクス分科会 幹事 2024/04 - 応用物理学会東北支部 庶務幹事 2024/04 - Show all ︎Show first 5 Professional Memberships 3 THE HEAT TRANSFER SOCIETY OF JAPAN 日本セラミックス協会 応用物理学会 Research Interests 7 dynamic control of heat nanosheet spin thermal conductivity magnon high thermal conductive glass stress evaluation chemically strengthened glass Research Areas 1 Nanotechnology/Materials / Inorganic materials / Awards 14 第78回学術講演会 第28回講演奨励賞 2023/12　応用物理学会東北支部　水と電圧印加を用いたLa5Ca9Cu24O41の可逆的マグノン制御とその機構解明 2021年年会優秀ポスター発表賞 最優秀賞 2021/05　日本セラミックス協会　「動的熱制御幅の向上を指向したマグノン熱伝導性ナノシートの創製」 第24回（2019年度）支部講演奨励賞 2020/01　応用物理学会東北支部　「核磁気共鳴法を用いたMgO飽和析出ガラスの構造調査と熱伝導性の向上」 平成30年度 研究発表会 優秀発表賞 2018/11　日本セラミックス協会東北北海道支部　「顕微ラマン分光による構造分析を用いた化学強化ガラスの非破壊応力評価手法の開発」 光ファイバ応用技術研究会（OFT）2018年度学生ポスター賞 優秀賞 2018/10　電気情報通信学会　「La–Ca–Cu–O系スピン熱伝導性薄膜の電界印加下における熱伝導率評価」 21世紀記念倉田元治賞 2018/06　日本セラミックス協会 2018年年会 優秀ポスター発表賞 2018/05　日本セラミックス協会　「化学強化ガラスにおける短・中距離構造及び強化の深さ方向非破壊・非接触評価」 平成28年度東北北海道支部研究発表会 優秀発表賞 2016/11　日本セラミックス協会　「スピン熱伝導性La5Ca9Cu24O41結晶薄膜の熱拡散率と構造の相関」 平成27年度トーキン科学技術賞 2016/03　トーキン科学技術振興財団 The ICG Poster Award 2015/09　ICG Annual Meeting 2015　&＃34;Synthesis of spinon thermal conductivity SrCuO2 by laser irradiation onto rf-sputtered Sr-Cu-O films&＃34; 第31回応用物理学会論文奨励賞 2009/09　応用物理学会 The ICG Poster Award 2018/09　ICG Annual Meeting 2018　&＃34;Optically-stimulated Luminescence of ZrO2 Powder toward Human-body Temperature Sensing&＃34; 第11回JSAPフォト＆イラストコンテスト 最優秀賞 2018/03　「氷河～架空の惑星にて」 第4回JSAPフォトコンテスト 優秀賞 2014/09　応用物理学会　「緑橙～幻燈螢光」 Show all ︎Show 5 Papers 58 Face-on orientation of spin ladders in La5Ca9Cu24O41 films deposited by radio-frequency magnetron sputtering on heated SiO2 and Si substrates Peer-reviewed Shota Watanabe, Nobuaki Terakado, Yoshihiro Takahashi, Takamichi Miyazaki, Koki Naruse, Takayuki Kawamata, Takumi Fujiwara Applied Surface Science　154444-154444　2022/12/01 Publisher: Elsevier BV DOI： 10.1016/j.apsusc.2022.154444 　 ISSN：0169-4332 Nanosheet fabrication from magnon thermal conductivity cuprates for the advanced thermal management Peer-reviewed Hiroya Kinoshita, Nobuaki Terakado, Yoshihiro Takahashi, Takamichi Miyazaki, Chitose Ishikawa, Koki Naruse, Takayuki Kawamata, Takumi Fujiwara npj 2D Materials and Applications　6　(1)　2022/10/13 Publisher: Springer Science and Business Media LLC DOI： 10.1038/s41699-022-00344-2 　 eISSN：2397-7132 More details Close Abstract Spin-chain–spin-ladder cuprates, such as La₅Ca₉Cu₂₄O₄₁, have notable electronic and thermal properties because of their unique electron spin arrangement. Among them, magnon thermal conductivity, which originates from the excitation of paired electron spins, is promising for the advanced thermal management applications that enable dynamic control of heat flow. This is because of its high, anisotropic thermal conductivity at room temperature and its dynamic controllability. In this study, we report nanosheet fabrications from polycrystalline La₅Ca₉Cu₂₄O₄₁ to enhance the control width. We obtained that the nanosheets with a thickness of about 3 nm are obtained via immersion of the polycrystals in a NaOH aqueous solution. We propose the exfoliation model based on the chemical reaction between the (La/Ca)₂Cu₂O₃ subsystem and NaOH solution. The nanosheet fabrications can also lead to new research development on spin-ladder system and other strongly correlated cuprates. Dynamic control of heat flow using a spin-chain ladder cuprate film and an ionic liquid Peer-reviewed Terakado, N., Nara, Y., Machida, Y., Takahashi, Y., Fujiwara, T. Scientific Reports　10　(1)　2020/12 Publisher: Springer Science and Business Media LLC DOI： 10.1038/s41598-020-70835-z 　 ISSN：2045-2322 eISSN：2045-2322 A novel method for stress evaluation in chemically strengthened glass based on micro-Raman spectroscopy Peer-reviewed Nobuaki Terakado, Ryusei Sasaki, Yoshihiro Takahashi, Takumi Fujiwara, Shuji Orihara, Yoshio Orihara COMMUNICATIONS PHYSICS　3　(1)　2020/02 Publisher: NATURE PUBLISHING GROUP DOI： 10.1038/s42005-020-0305-7 　 More details Close Chemically strengthened glass is widely used for screen protection in mobile devices, and its strengthening processes and application fields have rapidly diversified. The origin of the strength is residual compressive stress induced by ion exchange, and the stress evaluation has been performed via the photoelastic effect. However, for a deep understanding of the nature of the strength and development of stronger glasses, we need a method directly connected to atomic-scale glass structures. Here, we propose a method based on the &＃34;stuffing&＃34; effect, where we can determine the residual stress non-contactively and non-destructively with a high spatial resolution using Boson, D-1, D-2, and A(1) peaks in micro-Raman spectra. Finally, we show a plausible depth dependence of the residual stress.The strength of glass can be increased post-production by treatment with chemical processes, and such materials are used in everyday devices such as mobile phones. Here, the authors report a non-invasive method based on micro-Raman spectroscopy to analyse the compressive stress responsible for the increased strength of the treated glass. Transparent glass-ceramics for thermal management application: achievement of optical transparency and high thermal conductivity Peer-reviewed Nobuaki Terakado, Toshikazu Yoshimine, Ryusei Kozawa, Yoshihiro Takahashi, Takumi Fujiwara RSC Advances　10　(38)　22352-22360　2020 Publisher: Royal Society of Chemistry (RSC) DOI： 10.1039/d0ra03026k 　 eISSN：2046-2069 More details Close

Oxide glass is an industrial material with advantages such as optical transparency and shaping ability of the melt, but at the same time, it is a bad conductor of heat due to its disordered structures.

Contribution of spinons to thermal properties of glass-ceramics containing spin-chain compound SrCuO2 Peer-reviewed Nobuaki Terakado, Yuudai Yokochi, Kouki Watanabe, Yoshihiro Takahashi, Takumi Fujiwara JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　126　(12)　1019-1021　2018/12 Publisher: CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI DOI： 10.2109/jcersj2.18116 　 ISSN：1882-0743 eISSN：1348-6535 More details Close Materials with high thermal conductivity have attracted considerable attention for thermal management of electronic devices. Therefore, focusing on formability and anisotropic heat transfer, we fabricated glass-ceramics containing the spin-chain compound SrCuO2 and demonstrated its high thermal conductivity in the previous work, where SrCuO2 is known to exhibit high thermal conductivity owing to the presence of quasiparticles, i.e., spinons. In this study, we attempt to confirm the presence of spinons by analyzing temperature dependence of specific heat and investigate relationship between spinons and thermal properties. (C) 2018 The Ceramic Society of Japan. All rights reserved. Attempt to fabricate a high thermal conductivity, transparent oxide glass by dispersing MgO crystals and refractive index matching Peer-reviewed Nobuaki Terakado, Ryusei Kozawa, Toshikazu Yoshimine, Yoshihiro Takahashi, Takumi Fujiwara AIP ADVANCES　8　(11)　2018/11 Publisher: AMER INST PHYSICS DOI： 10.1063/1.5054339 　 ISSN：2158-3226 More details Close Oxide glasses generally have low thermal conductivity due to their disordered structures. Here, a fabrication method to provide them with high thermal conductivity while retaining their optical transparency is proposed. It consists of dispersing similar to 20 mu m MgO crystals in a glass matrix and matching their refractive indexes to prevent the decrease of the oxide glass optical transparency due to light scattering. The dispersion of the MgO crystals increased the thermal conductivity of the original glass by similar to 50% and the new glass still exhibited optical transparency. Such MgO-dispersed glass could be successfully used in thermal management applications requiring both transparency and formability. (C) 2018 Author(s). CO2 laser-induced weakening in chemically strengthened glass: Improvement in processability and its visualization by Raman mapping Peer-reviewed Nobuaki Terakado, Shohei Uchida, Ryusei Sasaki, Yoshihiro Takahashi, Takumi Fujiwara CERAMICS INTERNATIONAL　44　(3)　2843-2846　2018/02 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.ceramint.2017.11.030 　 ISSN：0272-8842 eISSN：1873-3956 More details Close Chemically strengthened glass has become essential in our daily lives and the demand is rapidly increasing in a variety of fields. However, the conventional cutting process is not applicable because of its tough layer with the compressive stress. To achieve higher-throughput production of the glass, we report spatially selective weakening of the compression layer by CO2 laser scanning and provide its visualization by Raman mapping. We demonstrate cutting the scanned glass without shattering using a typical scribing wheel. Finally, we discuss the improvement in processability from the viewpoint of microscopic structures by means of thermal analysis and Raman spectroscopy. Post-annealing effects in two-dimensional spin system SrCuO2 sputtered on glass substrate Peer-reviewed Ryosuke Takahashi, Nobuaki Terakado, Yoshiki Yamazaki, Yoshihiro Takahashi, Takumi Fujiwara JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　125　(5)　423-426　2017/05 Publisher: CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI DOI： 10.2109/jcersj2.16328 　 ISSN：1882-0743 eISSN：1348-6535 More details Close We prepared SrCuO2 thin film by radio-frequency magnetron sputtering on glass substrate and have investigated its post-annealing effects on structure and thermal conductivity. The as-sputtered film belongs to two-dimensional spin system SrCuO2, namely, layer-type SrCuO2, which has a possibility of exhibiting high, anisotropic thermal conductivity by magnetic excitation of the spins. It was found that the as-sputtered film has (001)-orientation in which the spin layers are parallel to the surface of substrate and that post-annealing results in enhancement of crystallinity of the film such as disappearance of grain boundaries, which can cause an increase in thermal conductivity. (C) 2017 The Ceramic Society of Japan. All rights reserved. Line patterning of anisotropic spin chains by polarized laser for application in micro-thermal management Peer-reviewed Nobuaki Terakado, Ryosuke Takahashi, Yoshihiro Takahashi, Takumi Fujiwara APPLIED PHYSICS LETTERS　110　(19)　191902　2017/05 Publisher: AMER INST PHYSICS DOI： 10.1063/1.4983369 　 ISSN：0003-6951 eISSN：1077-3118 More details Close The control of heat flow has become increasingly important in energy saving and harvesting. Among various thermal management materials, spinon thermal conductivity materials are promising for heat flow control at microscales because they exhibit high, anisotropic thermal conductivity resulting from spin chains. However, there has been only little development of the materials for controlling heat flow. Here, we present the line patterning of the spin chain structure on a SrCuO2 nanocrystalline film by laser scanning. When the polarization direction of laser light was orthogonal to the scanning direction, we found that the spin-chain structure anisotropically grew on the patterned line. Published by AIP Publishing. Depth analysis of a compression layer in chemically strengthened glass using depth-resolved micro-Raman spectroscopy Peer-reviewed Nobuaki Terakado, Shohei Uchida, Yoshihiro Takahashi, Takumi Fujiwara, Mototaka Arakawa JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　124　(10)　1164-1166　2016/10 Publisher: CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI DOI： 10.2109/jcersj2.16138 　 ISSN：1882-0743 eISSN：1348-6535 More details Close We performed depth analysis of a compression layer in Corning Gorilla Glass 3, one of commercialized chemically-strengthened glasses, using depth-resolved micro-Raman spectroscopy. We obtained a depth variation of Raman spectra and an ion-exchange rate of Na for K was determined by energy dispersive X-ray spectroscopy. We found that a peak position around 1100 cm(-1) in the Raman spectra is shifted to higher wavenumber and the ion-exchange rate of Na for K increases with a decreasing depth when shallower than similar to 30 mu m. This correlation can be qualitatively explained as follows: compression of a TO2 tetrahedra network (T = Si or Al) induced by the ion exchange gives rise to an increase in frequency of vibrational modes of the TO4 tetrahedra. (C) 2016 The Ceramic Society of Japan. All rights reserved. Syntheses of Spinon Thermal Conductivity Materials in Sr-Cu-O System by Glass-Ceramics Technique Peer-reviewed Nobuaki Terakado, Yuudai Yokochi, Kouki Watanabe, Yoshihiro Takahashi, Takumi Fujiwara JOURNAL OF THE AMERICAN CERAMIC SOCIETY　99　(5)　1565-1572　2016/05 Publisher: WILEY-BLACKWELL DOI： 10.1111/jace.14096 　 ISSN：0002-7820 eISSN：1551-2916 More details Close We have synthesized spinon thermal conductivity materials in Sr-Cu-O system by glass-ceramics technique. The materials are promising for active control of thermal energy in microelectronic devices because of high and anisotropic thermal conduction, its controllability, and electric insulation. Nevertheless, research on these materials has been limited to that concerning theoretical perspectives and investigation of physical properties using large single crystals. In this study, we adopt glass-ceramics technique to synthesize these materials: We prepared melt-quenched multicomponent oxides including SrO and CuO, and checked its glass-forming ability and crystallization behaviors by heating. As a result, we have found that SrCuO2 and Sr14Cu24O41, known as the spinon thermal conductivity materials, are synthesized using SrO-CuO-Li2O-Al2O3-Ga2O3 system. This synthesis process for the system will provide practical application of the spinon thermal conductivity materials. Synthesis of chain-type SrCuO2 by laser irradiation on sputtered layer-type SrCuO2 film Peer-reviewed Nobuaki Terakado, Ryosuke Takahashi, Yoshihiro Takahashi, Takumi Fujiwara THIN SOLID FILMS　603　303-306　2016/03 Publisher: ELSEVIER SCIENCE SA DOI： 10.1016/j.tsf.2016.02.035 　 ISSN：0040-6090 More details Close We prepared SrCuO2 film by radio-frequency magnetron sputtering on silica glass and have investigated structure change induced by super-band-gap light. An X-ray diffraction pattern shows that the as-sputtered film is composed of (001)-oriented SrCuO2 nanothick crystals belonging to tetragonal system, i.e., the layer-type SrCuO2. Raman-scattering spectra show that irradiation of high-power super-band-gap laser light onto the film gives rise to structure change into orthorhombic system, i.e., the chain type SrCuO2, which is known to exhibit high, anisotropic thermal conductivity due to spin interaction. A mechanism of the structure change is discussed in terms of photoexcitation and heating process. (C) 2016 Elsevier B.V. All rights reserved. Fabrication of glass-ceramics containing spin-chain compound SrCuO2 and its high thermal conductivity Peer-reviewed Nobuaki Terakado, Kouki Watanabe, Takayuki Kawamata, Yuudai Yokochi, Yoshihiro Takahashi, Yoji Koike, Takumi Fujiwara APPLIED PHYSICS LETTERS　106　(14)　141902　2015/04 Publisher: AMER INST PHYSICS DOI： 10.1063/1.4917035 　 ISSN：0003-6951 eISSN：1077-3118 More details Close High thermal conductivity materials are in great demand for heat-flow control and heat dissipation in electronic devices. In this study, we have produced a glass-ceramics that contains spin-chain compound SrCuO2 and have found that the glass-ceramics yields high thermal conductivity of similar to 5W K-1 m(-1) even at room temperature. The glass-ceramics is fabricated through crystallization of inhomogeneous melt-quenched oxides made from SrCO3, CuO, Li2CO3, Ga2O3, and Al2O3. Transmission electron microscopy and X-ray and electron diffraction reveal that SrCuO2 crystallites with a size of 100-200 nm are precipitated in the glass-ceramics. The highness of the thermal conductivity is attributable to two sources: one is elongation of phonon mean free path due to the crystallization of the inhomogeneous structure or structural ordering. The other is emergence of the heat carriers, spinons, in the SrCuO2. This highly thermal conductive glass-ceramics is expected to be utilized as base materials for heat-flow control devices. (C) 2015 AIP Publishing LLC. Ultraviolet-induced erasable photochromism in bilayer metal oxide films Peer-reviewed Nobuaki Terakado, Keiji Tanaka, Akira Nakazawa SOLID STATE COMMUNICATIONS　151　(18)　1285-1287　2011/09 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/j.ssc.2011.05.037 　 ISSN：0038-1098 More details Close We demonstrate that the optical transmittance of bilayer samples consisting of pyrolytically coated amorphous Mg-Sn-O and metal oxide films such as In(2)O(3) and SnO(2) decreases upon ultraviolet illumination, but can be recovered by annealing in air at similar to 300 degrees C. Spectral, structural, and compositional studies suggest that this photochromic phenomenon is induced by photoelectronic excitation in the Mg-Sn-O film, electron injection into the metal oxide, which becomes negatively charged, and subsequent formation of metallic particles, which absorb and/or scatter visible light. (C) 2011 Elsevier Ltd. All rights reserved. Thin-film solar-chemical battery: Photo-charging and discharging in amorphous AgAsS2 films Peer-reviewed Nobuaki Terakado, Keiji Tanaka JOURNAL OF APPLIED PHYSICS　110　(1)　016103　2011/07 Publisher: AMER INST PHYSICS DOI： 10.1063/1.3606426 　 ISSN：0021-8979 More details Close We have fabricated a rechargeable photo-chemical battery using ion-hole conducting AgAsS2 films. An asymmetrically-electroded Al/AgAsS2/SnO2 yields photocurrents and upon illumination it is concomitantly charged up. When the illumination is stopped, the stack discharges electricity into an external circuit. This photo-charging and discharging phenomenon is attributed to a photo-chemical modification of Ag-ion distribution in amorphous AgAsS2. (C) 2011 American Institute of Physics. [doi:10.1063/1.3606426] Electrical responses of chalcogenide films in the photodoping process Peer-reviewed Nobuaki Terakado, Keiji Tanaka THIN SOLID FILMS　519　(11)　3773-3777　2011/03 Publisher: ELSEVIER SCIENCE SA DOI： 10.1016/j.tsf.2010.12.161 　 ISSN：0040-6090 More details Close The photodoping process in Al/AsS2/Ag tri-layer films has been studied through measurements of electrical impedance, photodoped-layer thickness, and photocurrent. Frequency dependence of the impedance suggests that the sample under photodoping can be approximated by an equivalent electrical circuit. A thickness of photodoped layers, which is estimated from the impedance, is in agreement with a geometrical thickness measured by an atomic force microscope for chemically etched samples. Under the photodoping (with zero bias voltages), a photocurrent remains constant at similar to 5 pA, and near the completion it increases to similar to 1 nA, which is followed with a gradual decrease. By applying a bias voltage between the top (semi-transparent Al) and bottom (Ag) electrodes, we can change a photodoping rate by an order. This rate change is attributable to the modulation of an effective electric field in the doped layer, which induces the motion of Ag ions. (C) 2010 Elsevier B.V. All rights reserved. Ag-photodoping in nano-structured GeO(2)-GeS(2) glasses Peer-reviewed Nobuaki Terakado, Keiji Tanaka PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 6, SUPPL 1　6　S75-S78　2009 Publisher: WILEY-V C H VERLAG GMBH DOI： 10.1002/pssc.200881353 　 ISSN：1862-6351 More details Close Composition dependence of Ag-photodoping in xGeO(2)-(100x)GeS(2) glasses has been studied. The doping rate decreases with an increase in x, and becomes negligible at x >= 60. This photodoping disappearance can be related with transformation from percolated GeS2 networks in the heterogeneous oxy-chalcogenide glasses to isolated nano-scale clusters. Remarks on photodoping processes and overall composition dependences are also given. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Nanoscale Heterogeneous Structures in GeO2-GeS2 Glasses Peer-reviewed Nobuaki Terakado, Keiji Tanaka JAPANESE JOURNAL OF APPLIED PHYSICS　47　(10)　7972-7974　2008/10 Publisher: JAPAN SOC APPLIED PHYSICS DOI： 10.1143/JJAP.47.7972 　 ISSN：0021-4922 More details Close Atomic bonding, structures in xGeO(2)-(100 - x)GeS2 glasses have bee it studied through structural and chemical experiments. Atomic force microscope images in alkali-etched samples with x = 80 mol % show nano-scale clips, which are ascribable to isolated GeS2 clusters. Transmission electron microscope images and small angle X-ray scattering patterns suggest that the glass with x - 50 has pronounced heterogeneous structures in nanoscales. Composition dependence of an etching rate exhibits a characteristic change at x = 60, which can be interpreted as a percolation threshold of tetrahedral GeS4 units. These results support a nanostructure model for the oxy-chalcogenide glass. [DOI: 10.1143/JJAP.47.7972] Does the charged defect exist in nano-structured oxy-chalcogenide glass? Peer-reviewed Nobuaki Terakado, Keiji Tanaka APPLIED PHYSICS EXPRESS　1　(8)　081501　2008/08 Publisher: JAPAN SOC APPLIED PHYSICS DOI： 10.1143/APEX.1.081501 　 ISSN：1882-0778 More details Close Photoluminescence and electron-spin resonance in nano-structured GeO(2)-GeS(2) glasses have been studied. With an increase in the GeO(2) content from 0 to 80 mol %, a luminescence peak blue-shifts from 1.3 to 2.1 eV in photon energy, which is more prominent than an increase in the optical gap from 3.4 to 3.6 eV. Dark and photoinduced electron-spin signals become maximal at around an intermediate composition 50GeO(2)-50GeS(2). It is difficult to interpret these composition variations using the charged defect model proposed for chalcogenide glasses. (C) 2008 The Japan Society of Applied Physics. The structure and optical properties of GeO2-GeS2 glasses Peer-reviewed Nobuaki Terakado, Keiji Tanaka JOURNAL OF NON-CRYSTALLINE SOLIDS　354　(18)　1992-1999　2008/04 Publisher: ELSEVIER SCIENCE BV DOI： 10.1016/j.jnoncrysol.2007.11.003 　 ISSN：0022-3093 eISSN：1873-4812 More details Close Oxy-chalcogenide glasses with compositions of xGeO(2)-(100 - x)GeS2, where 0 <= x <= 100 mol%, have been prepared and studied in terms of their structures and optical properties. X-ray fluorescence spectroscopy shows that Ge:S ratio can deviate from GeS2 by similar to 10 at.%, depending critically upon the preparation conditions. Raman scattering spectroscopy suggests that stoichiometric GeO2-GeS2 glasses have a heterogeneous structure in the scale of 1-100 nm. The optical gaps are nearly constant at 3.0-3.5 eV for glasses with 0 <= x <= 80 mol% and abruptly increase to similar to 6 eV in GeO2. This dependence suggests that the optical gap is governed by GeS2 clusters, which are isolated and/or percolated. Composition-deviated glasses appear as orange and brown, and these glasses seem to have more inhomogeneous structures. (c) 2007 Elsevier B.V. All rights reserved. Photoinduced phenomena in GeO2-GeS2 glasses Peer-reviewed Nobuaki Terakado, Keiji Tanaka JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　46　(12-16)　L265-L267　2007/04 Publisher: INST PURE APPLIED PHYSICS DOI： 10.1143/JJAP.46.L265 　 ISSN：0021-4922 More details Close Composition dependences of glass-transition temperature, optical gap, photodarkening, and photoinduced volume change in xGeO(2)-(100-x)GeS2 oxy-chalcogenide glasses have been studied comparatively. The transition temperature and optical gap are nearly constant at 0 <= x less than or similar to 80 mol %, while the photodarkening and volume expansion appear only at x less than or similar to 60. Implications of these results are discussed. Photo-induced phenomena in GeO2 glass Peer-reviewed Nobuaki Terakado, Keiji Tanaka JOURNAL OF NON-CRYSTALLINE SOLIDS　352　(36-37)　3815-3822　2006/10 Publisher: ELSEVIER SCIENCE BV DOI： 10.1016/j.jnoncrysol.2006.06.018 　 ISSN：0022-3093 More details Close Photo-induced changes in GeO2 glass have been studied in terms of its optical and structural properties. Band-gap excitation gives rise to modifications in mid-gap optical absorption and photo-luminescence spectra. It also produces electron-spin signals at g similar or equal to 1.995 and 2.008. Raman-scattering spectrum becomes sharper, X-ray diffraction patterns show a disappearance of a crystalline peak, and the illuminated surfaces expand. These observations can be accounted for by assuming bond transformations from rutile-like to defective quartz-like structures and/or from small to large rings. These photo-induced changes in GeO2 are discussed in comparison with those in SiO2 and GeS2. (c) 2006 Elsevier B.V. All rights reserved. Photo-induced phenomena in sputtered GeO2 films Peer-reviewed N Terakado, K Tanaka JOURNAL OF NON-CRYSTALLINE SOLIDS　351　(1)　54-60　2005/01 Publisher: ELSEVIER SCIENCE BV DOI： 10.1016/j.jnoncrysol.2004.10.002 　 ISSN：0022-3093 More details Close Macroscopic and microscopic changes in sputtered GeO2 films induced by band-gap light from an ArF excimer laser have been studied. When irradiated at 1 atm, the film thickness increases, surface-roughness increases, refractive-index decreases, hygroscopic enhancements, and Ge-O-Ge distance increases. Irradiations in vacuum make these changes smaller or undetectable. These photoinduced changes are discussed from phenomenological and structural viewpoints, and compared with characteristics in GeO2-SiO2 and GeS2 films. (C) 2004 Elsevier B.V. All rights reserved. Photo-induced bending of amorphous As2S3 bulk and fiber driven by optical torque Peer-reviewed Masaki Wada, Yukihide Ishibashi, Nobuaki Terakado, Kosei Kuryu, Kazuki Mitsui, Tsuyoshi Asahi, Akira Saitoh Journal of Materials Science: Materials in Electronics　35　804　2024/04 Diversely phased glass-ceramics in Bi2O3–SiO2 system for heterostructure formation: A demonstration via visible-light-sensitive photocatalytic reaction Peer-reviewed OhHyeok Kwon, Yoshihiro Takahashi, Nobuaki Terakado, Takamichi Miyazaki, Takumi Fujiwara Ceramics International　50　(8)　13988-13992　2024/04 Publisher: Elsevier BV DOI： 10.1016/j.ceramint.2024.01.188 　 ISSN：0272-8842 Optical modulation in nonlinear-optical glass-ceramic fiber driven by Pockels effect Peer-reviewed Takuma Nakamura, Yoshihiro Takahashi, Nobuaki Terakado, Takamichi Miyazaki, Takumi Fujiwara Journal of the Ceramic Society of Japan　132　(1)　11-15　2024/01/01 Publisher: Ceramic Society of Japan DOI： 10.2109/jcersj2.23139 　 ISSN：1882-0743 eISSN：1348-6535 Silicate glass-ceramic fibers with nonlinear optical crystals: Evaluation of propagation loss and comparison to optical materials Peer-reviewed Takuma Nakamura, Yoshihiro Takahashi, Nobuaki Terakado, Takamichi Miyazaki, Takumi Fujiwara Ceramics International　2023/06 Publisher: Elsevier BV DOI： 10.1016/j.ceramint.2023.06.217 　 ISSN：0272-8842 Potential of afterglow zirconia as a sensitive biological temperature probe Peer-reviewed Aoni Sato, Yoshihiro Takahashi, Nobuaki Terakado, Takamichi Miyazaki, Noriko Onoue, Tsuyoshi Shinozaki, Takumi Fujiwara Ceramics International　48　(17)　25587-25591　2022/09/01 DOI： 10.1016/j.ceramint.2022.05.238 　 ISSN：0272-8842 More details Close Noninvasive and site-selective temperature sensing is required in biology and advanced medicine. Recently, we proposed a new concept for temperature sensing, which is based on afterglow and optically-stimulated luminescence [Sci. Rep. 10, 2242 (2020)]. Here we assessed the thermal sensitivity of afterglow zirconia and clarified the potential of this material as probe phosphor by thermoluminescence measurements. The evaluated sensitivity value of the zirconia was 10 %/K, which was higher than typical materials used in luminescent thermometers. Therefore, the prepared zirconia is a great candidate as a harmless and biocompatible sensing probe. Repetitive afterglow in zirconia by pulsed near-infrared irradiation toward biological temperature sensing. International-journal Peer-reviewed Masaharu Ohashi, Yoshihiro Takahashi, Nobuaki Terakado, Noriko Onoue, Tsuyoshi Shinozaki, Takumi Fujiwara Scientific Reports　12　(1)　8587-8587　2022/05/21 DOI： 10.1038/s41598-022-12585-8 　 More details Close Photoluminescence provides information about the surrounding environment. In this study, aiming to develop a non-invasive deep body-temperature sensing method, we investigated photoluminescence properties of afterglow zirconia (ZrO2) by pulsed near-infrared (NIR) light irradiation based on the biological temperature. Pulsed light irradiation produced optically stimulated luminescence, followed by afterglow, with the property of repeating 100 times or more. Furthermore, the basic principle of temperature measurement was demonstrated through afterglow decay curve measurements. The use of harmless ZrO2 as a sensing probe and NIR light, which is relatively permeable to living tissues, is expected to realize temperature measurements in the brain and may also facilitate optogenetic treatment. Nanostructure and photocatalytic behavior of glass-ceramics in Bi2O3Nb2O5Li2OB2O3SiO2system Peer-reviewed Kwon, O.H., Takahashi, Y., Miyazaki, T., Terakado, N., Fujiwara, T. Journal of the Ceramic Society of Japan　128　(10)　839-842　2020/10/01 Publisher: Ceramic Society of Japan DOI： 10.2109/jcersj2.20125 　 ISSN：1348-6535 1882-0743 eISSN：1348-6535 Fresnoite-type Ba2TiGe2O8 glass-ceramics toward electro-optic device: Crystallization structure and Pockels effect Peer-reviewed Haruki Okamoto, Yoshihiro Takahashi, Takuma Nakamura, Nobuaki Terakado, Takamichi Miyazaki, Takumi Fujiwara Journal of the European Ceramic Society　2020/06 Publisher: Elsevier BV DOI： 10.1016/j.jeurceramsoc.2020.06.054 　 ISSN：0955-2219 Temperature dependence of afterglow in zirconia and its optically-stimulated luminescence by bone-through irradiation for biological temperature probe. International-journal Peer-reviewed Masaharu Ohashi, Yoshihiro Takahashi, Nobuaki Terakado, Noriko Onoue, Tsuyoshi Shinozaki, Takumi Fujiwara Scientific Reports　10　(1)　2242-2242　2020/02/10 DOI： 10.1038/s41598-020-58979-4 　 More details Close Development of minimally invasive and site-selective biological temperature sensing is quite important in medical field. This study presents a novel temperature sensing technique based on afterglow and optically-stimulated luminescence (OSL). The dependence of afterglow photoluminescent intensity on the environmental temperature of zirconia (ZrO2) phosphor is examined to validate its use as a sensing probe. In addition, assuming the measurement in deep-part of human body, we have applied the information gathered from our validation to observe OSL from the ZrO2 by irradiation with near-infrared laser through a bone sample. This study demonstrates an alternative medical application of phosphor, and introduces an elemental-technology for the temperature sensing. Fabrication of VO2-Dispersed Glass in B2O3-P2O5-V2O5 System and Its Thermal Property Peer-reviewed Kei Muramoto, Yoshihiro Takahashi, Nobuaki Terakado, Yoshiki Yamazaki, Shigeru Suzuki, Takumi Fujiwara FRONTIERS IN MATERIALS　7　2020/02 Publisher: FRONTIERS MEDIA SA DOI： 10.3389/fmats.2020.00005 　 eISSN：2296-8016 More details Close Phase change material (PCM), which enables heat storage based on phase transition, plays an important role for efficient energy utilization. This paper briefly describes our recent study about all-solid PCM by combination of vanadium dioxide (VO2) with latent heat storage capacity and multicomponent glass, i.e., VO2-dispersed glass. A B2O3-P2O5-V2O5 glass system is used as a matrix for the VO2-dispersed glass. An attempt to describe its latent heat storage function is given. Endothermic behavior due to structural phase transition of the VO2 crystals was observed in the VO2-dispersed sample, and the transition enthalpy corresponding to latent heat storage capacity was estimated to be Delta H similar to 9.5 J/g. The value of the studied sample was larger than the value of dispersed glass in the BaO-TeO2-V2O5 system that was previously reported. Potential for PCM was considered in the studied sample. Photoluminescence and afterglow in samarium-doped zirconia toward biological temperature sensor Peer-reviewed Satoshi Goto, Yoshihiro Takahashi, Nobuaki Terakado, Yasushi Nakajima, Noriko Onoue, Tsuyoshi Shinozaki, Takumi Fujiwara JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　127　(10)　696-699　2019/10 Publisher: CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI DOI： 10.2109/jcersj2.19082 　 ISSN：1882-0743 eISSN：1348-6535 More details Close This study describes the investigation of photoluminescence (PL) and afterglow properties of samarium ion (Sm3+)-doped zirconia and the comparison with those of pure zirconia. The pure sample exhibits bluish PL and afterglow upon excitation by ultraviolet light, whereas white-to-reddish PL and white afterglow are detected by means of visual observation and spectroscopic measurement in the doped samples. It is therefore suggested that the Sm3+-doped zirconia is applicable to a temperature-sensing probe for the human body because it shows afterglow PL in the near-infrared &＃34;biological window&＃34; region. (C) 2019 The Ceramic Society of Japan. All rights reserved. Improvement of Pockels effect by crystallization-process control in nonlinear-optical glass-ceramics Peer-reviewed Tomoki Otsuki, Yoshihiro Takahashi, Nobuaki Terakado, Takumi Fujiwara CERAMICS INTERNATIONAL　45　(13)　16713-16716　2019/09 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.ceramint.2019.05.170 　 ISSN：0272-8842 eISSN：1873-3956 More details Close We have fabricated perfectly-surface-crystallized glass-ceramics (PSC-GCs) consisting of polar frenoite-type Sr2TiSi2O8 by different crystallization-process conditions, i.e., isothermal treatment at 880 degrees C for 72 h and 960 degrees C for 1 h, and have examined their Pockets effect in this study. The PSC-GCs obtained by the lower-temperature process exhibited the Pockels coefficients, i.e., r(13) similar to 3.0 pm/V and r(33) similar to 2.4 pm/V, and the coefficients exceeded the reported values of the PSC-GCs with Sr2TiSi2O8 phase. The improvement of Pockels effect is attributed to the higher crystal-orientation, which is provided by the lower-temperature condition. Crystallization of nanostructured ZrO2 phase in borosilicate glass: Impact of Al2O3 on tetragonal-to-monoclinic phase transformation Peer-reviewed Yasuhiro Nobuta, Yoshihiro Takahashi, Takamichi Miyazaki, Nobuaki Terakado, Noriko Onoue, Tsuyoshi Shinozaki, Takumi Fujiwara JOURNAL OF NON-CRYSTALLINE SOLIDS　501　49-54　2018/12 Publisher: ELSEVIER SCIENCE BV DOI： 10.1016/j.jnoncrysol.2017.12.052 　 ISSN：0022-3093 eISSN：1873-4812 More details Close Recently, we have developed the borosilicate glass, in which ZrO2 phase is singly crystallizable, and has found an emissive monoclinic ZrO2 dendrites in the resulting GCs. In order to promote the formation of monoclinic phase, we have examined the effect of substitution of alumina Al2O3 for ZrO2 in the precursor glass composition, i.e., 15Na(2)O-(15 - x)ZrO2-xAl(2)O(3)-30B(2)O(3)-40SiO(2). It was found that the substitution of small amount of Al2O3 (x = 1) gave a positive effect, i.e., increase in the amount of monoclinic phase and decrease in the crystal size. Furthermore, the substitution improved the internal quantum-yield. On the other hand, the further substitution (x >= 2) provided the decrease in amount of the monoclinic phase. Prominent long-lasting photoluminescence in defect-activated zirconia: A rare-earth free and accessible phosphor Peer-reviewed Kenichiro Iwasaki, Yoshihiro Takahashi, Nobuaki Terakado, Noriko Onoue, Tsuyoshi Shinozaki, Takumi Fujiwara CERAMICS INTERNATIONAL　44　(11)　12929-12933　2018/08 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.ceramint.2018.04.105 　 ISSN：0272-8842 eISSN：1873-3956 More details Close We investigated the long-lasting photoluminescence (LLP) properties in a commercial zirconia powder with a monoclinic system after thermal treatment at different temperatures. Clear-blue photoluminescence and LLP were observed in the zirconia without emissive dopants subjected to thermal treatment at 1400 degrees C. Decay curve measurements revealed a pronounced, visually observable bluish LLP that lasted for similar to 10 h at moderate temperature. Based on spectroscopic observation and electron spin resonance results, a possible origin of the LLP is discussed. VO2-dispersed glass: A new class of phase change material Peer-reviewed Kei Muramoto, Yoshihiro Takahashi, Nobuaki Terakado, Yoshiki Yamazaki, Shigeru Suzuki, Takumi Fujiwara SCIENTIFIC REPORTS　8　(1)　2275　2018/02 Publisher: NATURE PUBLISHING GROUP DOI： 10.1038/s41598-018-20519-6 　 ISSN：2045-2322 More details Close Energy storage technology is crucial for a sustainable society, and its realisation strongly depends on the development of materials. Oxide glass exhibits high durability. Moreover, the amorphous structure of the glass without periodic ordering demonstrates excellent formability and controllability, thus enabling a large-scale production. These factors provide impetus for the development of new materials for thermal management applications. As vanadium dioxide (VO2) with a strongly correlated electron system exhibits a structural phase transition, leading to a large heat of transition. Therefore, VO2 demonstrates immense potential as a phase change material (PCM). This study reports the fabrication of VO2-dispersed glass and examines its potential as a new latent heat storage material, which can be applied for massive PCM heat storage applications. Variation in Pockels constants of silicate glass-ceramics prepared by perfect surface crystallization Peer-reviewed Kazuya Takano, Yoshihiro Takahashi, Takamichi Miyazaki, Nobuaki Terakado, Takumi Fujiwara APPLIED PHYSICS LETTERS　112　(2)　2018/01 Publisher: AMER INST PHYSICS DOI： 10.1063/1.5017671 　 ISSN：0003-6951 eISSN：1077-3118 More details Close We investigated the Pockels effect in polycrystalline materials consisting of highly oriented polar fresnoite-type Sr2TiSi2O8 fabricated using perfectly surface-crystallized glass-ceramics (PSC-GCs). The chemical composition of the precursor glass was shown to significantly affect the crystallized texture, e.g., the crystal orientation and appearance of amorphous nanoparasites in the domains, resulting in variations in the Pockels constants. Single crystals exhibiting spontaneous polarization possessed large structural anisotropy, leading to a strong dependence of the nonlinear-optical properties on the direction of polarized light. This study suggests that variations in the Pockels constants (r(13) and r(33)) and tuning of the r(13)/r(33) ratio can be realized in PSC-GC materials. Published by AIP Publishing. Multicolor emission based on amorphous-to-crystalline phase transitions in nanostructured Mn-doped glass Peer-reviewed Yoshinobu Hoshino, Yoshihiro Takahashi, Nobuaki Terakado, Takumi Fujiwara JAPANESE JOURNAL OF APPLIED PHYSICS　56　(12)　2017/12 Publisher: IOP PUBLISHING LTD DOI： 10.7567/JJAP.56.120302 　 ISSN：0021-4922 eISSN：1347-4065 More details Close We fabricated glass-ceramics composed of emissive nanocrystals that show variation in photoluminescence coloration. The change in emission color is based on the amorphous-to-crystalline phase transformation in a Mn-containing zincogermanate glass. The transformation occurred at a 50 degrees C temperature range (538-588 degrees C), resulting in a change in photoluminescence color from orange to white to green. The color change is attributed to the co-crystallization of emissive nanophases and a change in the coordination state of Mn2+. Using laser-induced crystallization, we also achieved the space-selective arrangement of the different photoluminescence colors, indicating that photoluminescence coloration can be tuned in this Mn-doped glass. (C) 2017 The Japan Society of Applied Physics Formation and photoluminescence of zirconia dendrites in borosilicate glass-ceramics Peer-reviewed Yasuhiro Nobuta, Yoshihiro Takahashi, Takamichi Miyazaki, Nobuaki Terakado, Noriko Onoue, Tsuyoshi Shinozaki, Takumi Fujiwara JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　125　(4)　343-347　2017/04 Publisher: CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI DOI： 10.2109/jcersj2.17001 　 ISSN：1882-0743 eISSN：1348-6535 More details Close We prepared a borosilicate glass, in which the ZrO2 phase is singly crystallizable, i.e., 15Na(2)O-15ZrO(2)-30B(2)O(3)-40SiO(2) glass, and investigated the texture and morphology of the resulting glass-ceramics. ZrO2 dendrites with a tetragonal system (high-temperature phase) were developed as initial phase, and the tetragonal phase was transformed to the monoclinic phase (lowtemperature phase) by elongation of the heat-treatment time, and finally the needle-/rod-like crystals on a scale of few hundred nanometers were obtained. The glass-ceramics with monoclinic ZrO2 showed photoluminescence around 480nm by excitation in the ultraviolet region. The effect of TiO2-addition on the photoluminescent property was also considered. (C) 2017 The Ceramic Society of Japan. All rights reserved. Synthesis of nanocrystals from glass-ceramics by YAG-laser irradiation: Mn4+ -doped Li2Ge4O9 deep-red nanophosphor Peer-reviewed Yuto Odawara, Yoshihiro Takahashi, Yoshiki Yamazaki, Nobuaki Terakado, Takumi Fujiwara JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　125　(4)　378-381　2017/04 Publisher: CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI DOI： 10.2109/jcersj2.17002 　 ISSN：1882-0743 eISSN：1348-6535 More details Close Functional nanocrystals have received considerable attention because of their various applications. Although glass-ceramic (GC) processing is recognized as promising for preparation of nanostructured material, it is difficult to use the materials as nanocrystals as in. This study provides a possible way to obtain nanocrystals by irradiation of fundamental wave of Q-switched Nd: YAG laser to nanocrystallized GCs in liquid. In this study, we employed Mn4+: Li2Ge4O9 nanocrystallized GCs as the target, and succeeded in fabricating deep-red emissive nanocrystals with a size of similar to 100 nm. (c) 2017 The Ceramic Society of Japan. All rights reserved. Observation of visible light-driven water splitting by TiO2 crystallized glass Peer-reviewed Kazuki Yoshida, Hiroshi Takahashi, Hirokazu Masai, Nobuaki Terakado, Yoshihiro Takahashi, Takumi Fujiwara, Hideki Kato, Masato Kakihana INTERNATIONAL JOURNAL OF HYDROGEN ENERGY　41　(47)　22055-22058　2016/12 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/j.ijhydene.2016.10.016 　 ISSN：0360-3199 eISSN：1879-3487 More details Close Study on visible light response of photocatalytic materials is very important research area for future energy society. Generally, in conventional photocatalysts, visible light response is provided by defect introduction. This phenomenon is based on formation of trap level between valence and conduction band. In our previous report, we have already succeeded in observing the photocatalytic activity of TiO2 crystallized glass. Since glass-based material is suitable for industrial use, crystallized glass is expected to be a novel bulk photocatalyst with high productivity if we provide visible light response ability to TiO2 crystallized glass. In this study, we tried the defect introduction to TiO2 crystallized glass and investigated the photocatalytic activity under visible light irradiation. As a result, we have demonstrated water splitting by TiO2 crystallized glass with Ti3+ defect under visible light irradiation for the first time. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. Mn-doped LiNaGe4O9 as a rare-earth free phosphor: impact of Na-substitution on emission in tetragermanate phase Peer-reviewed Rie Suzuki, Jun Kunitomo, Yoshihiro Takahashi, Kensaku Nakamura, Minoru Osada, Nobuaki Terakado, Takumi Fujiwara JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　123　(1441)　888-891　2015/09 Publisher: CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI DOI： 10.2109/jcersj2.123.888 　 ISSN：1882-0743 eISSN：1348-6535 More details Close We have synthesized Mn4+-doped mixed tetragermanate phases in the Li2Ge4O9-LiNaGe4O9 system, i.e., Li(Li,Na)Ge4O9, by a glass-ceramic technique using stoichiometric precursor glasses, and have examined the effect of substitution of Na on their photoluminescence properties. The tetragermanate phases indicated clear red emission based on a E-2 <-(4)A(2) transition, and the entire substitution resulting in an LiNaGe4O9 phase provided an improvement of quenching temperature for the emission. Furthermore, the LiNaGe4O9 phase synthesized by solid-state reaction showed a high internal quantum yield and red color purity, demonstrating it to be a possible candidate as a rare-earth-free red phosphor. (C) 2015 The Ceramic Society of Japan. All rights reserved. Spectroscopically and thermometrically observed boson peaks in oxide glass system Peer-reviewed Kensaku Nakamura, Yoshihiro Takahashi, Nobuaki Terakado, Minoru Osada, Takumi Fujiwara JAPANESE JOURNAL OF APPLIED PHYSICS　54　(8)　088003　2015/08 Publisher: IOP PUBLISHING LTD DOI： 10.7567/JJAP.54.088003 　 ISSN：0021-4922 eISSN：1347-4065 More details Close We compare the boson peaks (BPs) observed in low-frequency Raman scattering with the BPs observed in low-temperature specific heat in many oxide glasses. We find a linear correlation of the maximum positions between the Raman BP and specific-heat BP regardless of the constituents. In addition, we show that several chalcogenide and molecular glasses also exhibit the same correlation. The linearity enables us to convert the BPs between different observation techniques, which is expected to provide significant insight into the features of the BP. (C) 2015 The Japan Society of Applied Physics Affects of supercooled liquid state on the properties of the crystallized phase: Microscopic and spectroscopic observations in ZnO-crystallized glass-ceramics Peer-reviewed Yoshihiro Takahashi, Mikio Kinoshita, Takamichi Miyazaki, Minoru Osada, Nobuaki Terakado, Takumi Fujiwara APPLIED PHYSICS LETTERS　107　(6)　061902　2015/08 Publisher: AMER INST PHYSICS DOI： 10.1063/1.4928538 　 ISSN：0003-6951 eISSN：1077-3118 More details Close We examined the crystallization and crystal growth of ZnO in the viscoelastic supercooled liquid (SCL) phase based on microscopic and spectroscopic observations. The resulting glass-ceramics exhibits complex ZnO dendrites that precede the formation of Zn-rich regions because of phase separation. Compressive stresses are concentrated at the interface of ZnO crystals and SCL phase, suggesting that the domains are subject to a resistance during ZnO crystal growth. Defects were detected in the crystallized ZnO and attributed to the suppression of smooth ordering of the Zn-rich regions in the SCL phase. (C) 2015 AIP Publishing LLC. Controllable photoluminescence by melting-process temperature in SnO-containing glass Peer-reviewed Mikio Kinoshita, Yoshihiro Takahashi, Nobuaki Terakado, Hirokazu Masai, Takumi Fujiwara JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　123　(1439)　611-614　2015/07 Publisher: CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI DOI： 10.2109/jcersj2.123.611 　 ISSN：1882-0743 eISSN：1348-6535 More details Close We prepared SnO-ZnO-B2O3 system glasses by means of melt-quenching technique with different melting-process temperatures in range of 1100-1500 degrees C, and examined the impact of the process temperature on photoluminescent (PL) property. The glass obtained at 1100 degrees C showed clear PL band at similar to 2.8 eV at room temperature. As elevating the process temperature, a shoulder appeared at lower-energy side of the PL band, and eventually broad band with peak at similar to 2.2 eV developed, resulting the clear orange PL. We demonstrated that the PL-color is controllable from blue to orange via white by change in the process temperature. (C) 2015 The Ceramic Society of Japan. All rights reserved. High thermal stability of red emission in Mn-doped benitoite-type strontium silicogermanate Peer-reviewed Rie Suzuki, Yoshihiro Takahashi, Kenichiro Iwasaki, Nobuaki Terakado, Takumi Fujiwara APPLIED PHYSICS EXPRESS　8　(7)　072603　2015/07 Publisher: IOP PUBLISHING LTD DOI： 10.7567/APEX.8.072603 　 ISSN：1882-0778 eISSN：1882-0786 More details Close We assessed the photoluminescence performance characteristics of Mn4+-doped tetragermanate and silicogermanate phases with a benitoite-type structure. We observed a visible red emission based on the E-2 ->(4)A(2) transition in the doped benitoite-type tetragermanate. The partial substitution of Si for Ge, resulting in SrGe3.495Mn0.005Si0.5O9, improved the internal quantum efficiency and thermal stability of the red emission. A possible explanation of the substitution effect was reasonably presented on the basis of the connectivity of luminescent polyhedral units and the decrease in the Franck-Condon off-set value in the benitoite structure. (C) 2015 The Japan Society of Applied Physics Pockels effect of silicate glass-ceramics: Observation of optical modulation in Mach-Zehnder system Peer-reviewed Kazuki Yamaoka, Yoshihiro Takahashi, Yoshiki Yamazaki, Nobuaki Terakado, Takamichi Miyazaki, Takumi Fujiwara SCIENTIFIC REPORTS　5　12176　2015/07 Publisher: NATURE PUBLISHING GROUP DOI： 10.1038/srep12176 　 ISSN：2045-2322 More details Close Silicate glass has been used for long time because of its advantages from material&＃39;s viewpoint. In this paper, we report the observation of Pockels effect by Mach-Zehnder interferometer in polycrystalline ceramics made from a ternary silicate glass via crystallization due to heat-treatment, i.e., glass-ceramics. Since the silicate system is employed as the precursor, merits of glass material are fully utilized to fabricate the optical device component, in addition to that of functional crystalline material, leading us to provide an electro-optic device, which is introducible into glass-fiber network. Large enhancement of photocatalytic activity by chemical etching of TiO2 crystallized glass Peer-reviewed Kazuki Yoshida, Yoshihiro Takahashi, Rie Ihara, Nobuaki Terakado, Takumi Fujiwara, Hideki Kato, Masato Kakihana APL MATERIALS　2　(10)　106103　2014/10 Publisher: AMER INST PHYSICS DOI： 10.1063/1.4897961 　 ISSN：2166-532X More details Close The authors aim to report the largest enhancement of photocatalytic activity by chemical etching in anatase-type TiO2 crystallized glass. Optimization of several conditions for crystallization behavior and chemical etching to realize the nano-structured ceramics (NSC) has been performed in the crystallized glass. NSC-fabrication by chemical etching in the crystallized glass is one of the most effective solutions to provide bulk materials with high specific surface area. We have found that the best condition for the NSC fabrication as a novel bulk photocatalyst in our glass system, and have obtained 16 times higher catalytic activity than that of non-etched one. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. Red-emissive Mn-doped Li2Ge4O9 phase synthesized via glass-ceramic route Peer-reviewed Jun Kunitomo, Rie Suzuki, Yoshihiro Takahashi, Takamichi Miyazaki, Nobuaki Terakado, Takumi Fujiwara JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　122　(1428)　725-727　2014/08 Publisher: CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI DOI： 10.2109/jcersj2.122.725 　 ISSN：1882-0743 eISSN：1348-6535 More details Close We synthesized the lithium-tetragermanate (Li2Ge4O9) phase doped with Mn4+ by glass-ceramics technique using the stoichiometric glass-precursor with different MnO2 concentrations, i.e., 20Li(2)O-80GeO(2)-xMnO(2) (x = 0.1-0.7), and examined their photoluminescent property. The doped phase showed clear red-emission at room temperature, and the internal quantum-yield was found to be approximately 40% in the samples with x = 0.1-0.3. (c) 2014 The Ceramic Society of Japan. All rights reserved. Multiferroic BiFeO3 glass-ceramics: Phase formation and physical property Peer-reviewed Yoshihiro Takahashi, Kousuke Meguro, Hiroshi Naganuma, Nobuaki Terakado, Takumi Fujiwara APPLIED PHYSICS LETTERS　104　(22)　221901　2014/06 Publisher: AMER INST PHYSICS DOI： 10.1063/1.4881138 　 ISSN：0003-6951 eISSN：1077-3118 More details Close A production of polycrystalline phase with glassy precursor, i.e., glass-ceramics processing, has a great potential to fabricate the sophisticated materials. In this study, we have prepared the Bi2O3-Fe2O3-BaO-B2O3 system precursor, in which BiFeO3 phase is crystallizable, and examined the phase formation and physical properties in resulting glass-ceramics. We found both ferroelectricity and ferromagnetism in the glass-ceramics consisting of BiFeO3 phase, i.e., multiferroic glass-ceramics. This study has demonstrated an alternative method for synthesis of polycrystalline BiFeO3 material. (C) 2014 AIP Publishing LLC. Anomalous anisotropic deformations of As2S3 flakes induced by linearly-polarized bandgap illumination Peer-reviewed Tanaka, K., Saitoh, A., Terakado, N. Journal of Non-Crystalline Solids　355　(37-42)　1828-1831　2009/10/01 DOI： 10.1016/j.jnoncrysol.2008.10.021 　 ISSN：0022-3093 Visible anisotropic deformation of chalcogenide glass by optical force Peer-reviewed Keiji Tanaka, Nobuaki Terakado, Akira Saitoh PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE　206　(5)　892-897　2009/05 Publisher: WILEY-V C H VERLAG GMBH DOI： 10.1002/pssa.200881349 　 ISSN：1862-6300 More details Close Semi-free As2S3 glass flakes undergo sub-mm scale anisotropic deformation upon illumination of linearly-polarized cw bandgap light. The mechanism has been ascribed to photoinduced birefringence, optical torque, and photo-induced fluidity. Quantitative measurements demonstrate that generated optical torque is similar to 10(-20) Nm under a light intensity of 1 mW. This value combined with measured deformation rates for As2S3 cantilevers suggests a related photo-induced fluidity of 10(-1) P-1, which is much more fluidal (similar to ten orders) than that reported in the conventional photo-induced fluidity. Reasons for this discrepancy are discussed. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Photoinduced phenomena in group VIb glasses Peer-reviewed K. Tanaka, A. Saitoh, N. Terakado JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS　20　38-42　2009/01 Publisher: SPRINGER DOI： 10.1007/s10854-007-9432-0 　 ISSN：0957-4522 More details Close Two aspects of photoinduced phenomena in oxide and chalcogenide glasses have been studied. One is a comparison of irreversible, reversible, and transitory changes in As(2)S(3), which gives insights into universal features of the photoinduced phenomenon. The other is composition dependence of structures and photodarkening in GeO(2)-GeS(2) glasses. The dependence suggests that percolating GeS(2) structures are required for the photodarkening. Photoinduced anisotropic deformations in covalent chalcogenide glasses Peer-reviewed K. Tanaka, N. Terakado, A. Saitoh JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS　10　(1)　124-130　2008/01 Publisher: NATL INST OPTOELECTRONICS ISSN：1454-4164 eISSN：1841-7132 More details Close The chalcogenide glass is known to exhibit prominent anisotropic deformations when illuminated by linearly-polarized bandgap light. We report new deformation phenomena for As2S3. We also propose that many deformation phenomena can be accounted for by an optical force model. Giant photo-expansion in chalcogenide glass Peer-reviewed K. Tanaka, A. Saitoh, N. Terakado JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS　8　(6)　2058-2065　2006/12 Publisher: NATL INST OPTOELECTRONICS ISSN：1454-4164 More details Close Glass exhibits many kinds of photoinduced phenomena, among which the giant photo-expansion appearing in chalcogenicle glasses such as As(2)S(3) may be the most dramatic and promising. Its feature, mechanism, and application including micro-lenses are described. Show all ︎Show first 5 Misc. 56 次世代熱マネジメントに向けたマグノン熱伝導物質のナノシート化技術の開発 寺門信明, 高橋儀宏, 宮崎孝道, 川股隆行, 藤原巧 月刊ファインケミカル　2023/10 マグノン熱伝導を利用した動的な熱流制御技術の開拓 寺門信明, 高橋儀宏, 宮崎孝道, 川股隆行, 藤原巧 金属　93　(1)　28-34　2023/01 シリケートガラスの結晶化制御とPockels効果の付与 寺門 信明, 中村 拓真, 高橋 儀宏, 藤原 巧 光アライアンス 2022年4月号　2022/04 ガラスの高熱伝導化: MgO結晶の析出と透明性の保持 寺門信明, 高橋儀宏, 藤原巧 NEW GLASS　36　10-12　2021/07 化学強化ガラスにおける圧縮応力の深さ分析 ― 顕微ラマン分光の利用と評価式の構築 ― 寺門信明, 高橋儀宏, 藤原巧, 折原秀治, 折原芳男 Jasco Report　63　(1)　8-12　2021 マグノン熱伝導を利用した熱流の電気的制御 寺門信明, 高橋儀宏, 藤原巧 クリーンエネルギー　30　(1)　8-14　2021 ISSN：0918-7510 顕微ラマン分光を用いた化学強化ガラスの局所応力評価 寺門信明, 高橋儀宏, 藤原 巧, 折原秀治, 折原芳男 NEW GLASS　35　27-31　2020/11 Establishment of a Formula for Local Stress Evaluation in Chemically Strengthened Glass Based on Raman Spectra 寺門信明, 高橋儀宏, 藤原巧, 折原秀治, 折原芳男 機能材料　40　(12)　27-35　2020 Publisher: シーエムシー出版 ISSN：0286-4835 Preparation of thin films with thermal conductivity by spins and phonons and development of artificial thermal properties by patterning 寺門 信明, 山崎 芳樹, 高橋 儀宏, 藤原 巧 NEW GLASS　31　(3)　21-24　2016/11 Publisher: ニューガラスフォーラム ISSN：0914-6563 Fujiwara laboratory, Tohoku University 寺門 信明 NEW GLASS　30　(2)　45-47　2015/07 Publisher: ニューガラスフォーラム ISSN：0914-6563 Fabrication of photocatalytic material by glass-ceramic technique and attempt of heterojunction formation KWON O., 寺門信明, 高橋儀宏, 藤原巧 日本セラミックス協会年会講演予稿集(CD-ROM)　2020　2020 Optical modulation in nonlinear-optical glass-ceramic fiber based on Pockels effect 中村拓真, 大槻智貴, 寺門信明, 高橋儀宏, 藤原巧 日本セラミックス協会年会講演予稿集(CD-ROM)　2020　2020 Perfectly-surface-crystallized glass-ceramics in titanogermanate system: Texture of fresnoite phase and Pockels coefficients 岡本晴樹, 高橋儀宏, 大槻智貴, 寺門信明, 藤原巧 日本セラミックス協会年会講演予稿集(CD-ROM)　2020　2020 シリケート系非線形結晶化ガラスファイバーのPockels効果 中村拓真, 寺門信明, 高橋儀宏, 藤原巧 応用物理学会東北支部学術講演会(CD-ROM)　75th　2020 Structural investigation of 1- and 2-step ion-exchanged strengthened glass by polarized micro-Raman scattering 江袋信悟, 寺門信明, 高橋儀宏, 藤原巧 日本セラミックス協会年会講演予稿集(CD-ROM)　2020　2020 Electric-field control of heat carrier in magnon thermal conductive La-Ca-Cu-O film 奈良由紀, 寺門信明, 寺門信明, 渡辺祥太, 藤原巧 応用物理学会春季学術講演会講演予稿集(CD-ROM)　67th　2020 Fabrication of MgO-precipitated glass having optical transparency and a thermal conductivity of >3 W/(m・K) 吉嶺季和, 寺門信明, 高橋儀宏, 藤原巧 応用物理学会春季学術講演会講演予稿集(CD-ROM)　67th　2020 Fabrication of spin thermal conductive nanosheets of La-Ca-Cu-O system for electric-field control of heat flow 木下大也, 寺門信明, 寺門信明, 高橋儀宏, 藤原巧 応用物理学会春季学術講演会講演予稿集(CD-ROM)　67th　2020 マグノン熱伝導結晶のナノシート化とその形成機構 木下大也, 寺門信明, 寺門信明, 高橋儀宏, 藤原巧 応用物理学会東北支部学術講演会(CD-ROM)　75th　2020 Reduction of Propagation Loss in Crystallized Glass for Active Fiber Application 藤原巧, 高橋儀宏, 寺門信明 レーザー研究　48　(7)　334-338　2020 ISSN：0387-0200 BaO-TiO₂-GeO₂系完全表面結晶化ガラスの作製と電気光学効果 岡本晴樹, 大槻智貴, 林原佑太, 寺門信明, 寺門信明, 高橋儀宏, 藤原巧 応用物理学会春季学術講演会講演予稿集(CD-ROM)　66th　2019 化学強化ガラスにおける残留応力と短距離構造の関係 寺門信明, 佐々木隆成, 江袋信悟, 高橋儀宏, 藤原巧, 折原秀治, 折原芳男 応用物理学会秋季学術講演会講演予稿集(CD-ROM)　80th　2019 顕微ラマン分光を用いた化学強化ガラスの局所応力評価法の開発 佐々木隆成, 寺門信明, 高橋儀宏, 藤原巧, 折原秀治, 折原芳男 日本セラミックス協会年会講演予稿集(CD-ROM)　2019　2019 完全表面結晶化ガラスにおける結晶配向性向上とPockels効果 大槻智貴, 高橋儀宏, 寺門信明, 藤原巧 日本セラミックス協会年会講演予稿集(CD-ROM)　2019　2019 残光体を用いた生体温度センシングにおける測定精度向上 佐藤碧丹, 後藤聡敏, 大橋昌立, 寺門信明, 高橋儀宏, 尾上紀子, 篠崎毅, 藤原巧 日本セラミックス協会年会講演予稿集(CD-ROM)　2019　2019 光触媒材料を指向したBi₂Ti₂O₇ナノ結晶化ガラスの作製 KWON O. H., KWON O. H., BAEK C. G., 寺門信明, 高橋儀宏, 藤原巧, YANG Y. S. 日本セラミックス協会年会講演予稿集(CD-ROM)　2019　2019 完全表面結晶化ガラスのPockels定数および二次非線形光学定数 高野和也, 舟嶋康祐, 高橋儀宏, 山崎芳樹, 寺門信明, 藤原巧 日本セラミックス協会年会講演予稿集(CD-ROM)　2019　2019 Fresnoite型Ba₂TiGe₂O₈結晶化ガラス:前駆体組成が与える微細組織とPockels効果への影響 岡本晴樹, 大槻智貴, 寺門信明, 高橋儀宏, 藤原巧 ガラスおよびフォトニクス材料討論会講演要旨集　60th　2019 生体温度センシングを指向したSmドープZrO₂残光体の開発 後藤聡敏, 大橋昌立, 寺門信明, 高橋儀宏, 中島靖, 尾上紀子, 篠崎毅, 藤原巧 セラミックス基礎科学討論会講演要旨集　57th　2019 スピン熱伝導性La-Ca-Cu-O薄膜における電界誘起構造変化 寺門信明, 寺門信明, 町田雄気, 高橋儀宏, 藤原巧 応用物理学会春季学術講演会講演予稿集(CD-ROM)　66th　2019 温度センシングに向けた残光性ジルコニアにおける熱処理温度と測定精度の関係 佐藤碧丹, 寺門信明, 高橋儀宏, 尾上紀子, 篠崎毅, 藤原巧 応用物理学会東北支部学術講演会(CD-ROM)　74th　2019 核磁気共鳴法を用いたMgO飽和析出ガラスの構造調査と熱伝導性の向上 吉嶺季和, 寺門信明, 高橋儀宏, 藤原巧 応用物理学会東北支部学術講演会(CD-ROM)　74th　2019 熱のアクティブ制御に向けたスピン熱伝導性薄膜の配向制御 渡辺祥太, 寺門信明, 寺門信明, 高橋儀宏, 藤原巧 応用物理学会春季学術講演会講演予稿集(CD-ROM)　66th　2019 La-Ca-Cu-O系スピン熱伝導薄膜における粒径と物性値の関係 奈良由紀, 寺門信明, 寺門信明, 高橋儀宏, 藤原巧 応用物理学会春季学術講演会講演予稿集(CD-ROM)　66th　2019 b軸配向したスピン梯子系Sr₁₄Cu₂₄O₄₁スパッタ膜の形成機構とその熱伝導率 渡辺祥太, 奈良由紀, 寺門信明, 寺門信明, 高橋儀宏, 藤原巧 応用物理学会秋季学術講演会講演予稿集(CD-ROM)　80th　2019 透明かつ高熱伝導なMgO飽和析出ガラスの開発と評価 吉嶺季和, 小澤龍成, 寺門信明, 高橋儀宏, 藤原巧 セラミックス基礎科学討論会講演要旨集　57th　2019 熱の電界制御に向けたLa-Ca-Cu-O系スピン熱伝導性薄膜の作製と周波数領域サーモリフレクタンス法による熱伝導性評価 奈良由紀, 寺門信明, 高橋儀宏, 藤原巧 セラミックス基礎科学討論会講演要旨集　57th　2019 Vanadium Dioxide-Dispersed Glass toward All-Solid Phase Change Material 高橋 儀宏, 寺門 信明, 藤原 巧 化学工学 = Chemical engineering of Japan　83　(9)　510-512　2019 Publisher: 化学工学会 ISSN：0375-9253 Science As Art 舟嶋康祐, 高橋儀宏, 寺門信明, 藤原 巧 応用物理　87　(11)　805-805　2018/11 光と色に関わるフォトセラミックスの最先端 生体温度センシングのためのZrO₂の残光および輝尽発光 高橋儀宏, 寺門信明, 尾上紀子, 篠崎毅, 藤原巧 セラミックス　53　(7)　500‐502　2018/07/01 ISSN：0009-031X レーザー照射によるシリケート系ガラスへの局所結晶化およびドメイン制御 林原佑太, 舟嶋康祐, 寺門信明, 高橋儀宏, 藤原巧 電子情報通信学会技術研究報告　118　(238(OFT2018 13-51)(Web))　2018 ISSN：0913-5685 放射状分極構造を有する結晶化ガラスファイバーの創製と非線形光学効果 林原佑太, 舟嶋康祐, 寺門信明, 高橋儀宏, 小澤祐市, 佐藤俊一, 長能重博, 藤原巧 電子情報通信学会技術研究報告　118　(238(OFT2018 13-51)(Web))　2018 ISSN：0913-5685 MgO飽和析出によるガラス複合材料の開発及び光透過率・熱伝導率評価 吉嶺季和, 小澤龍成, 寺門信明, 高橋儀宏, 藤原巧 電子情報通信学会技術研究報告　118　(238(OFT2018 13-51)(Web))　2018 ISSN：0913-5685 生体温度センシングのプローブのための残光体開発-ZrO₂へのSmドーピング効果- 後藤聡敏, 大橋昌立, 寺門信明, 高橋儀宏, 中島靖, 尾上紀子, 篠崎毅, 藤原巧 電子情報通信学会技術研究報告　118　(238(OFT2018 13-51)(Web))　2018 ISSN：0913-5685 MgO飽和析出による透明かつ高熱伝導なガラス複合材料の開発 吉嶺季和, 小澤龍成, 寺門信明, 高橋儀宏, 藤原巧 日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM)　31st　2018 Fabrication of heat transport circuit using high thermal conductivity materials with quantum spin chains 寺門信明 旭硝子財団助成成果報告書(Web)　2018　2018 La-Ca-Cu-O系スピン熱伝導性薄膜の電圧印加下における熱伝導率評価 奈良由紀, 寺門信明, 高橋儀宏, 藤原巧 電子情報通信学会技術研究報告　118　(238(OFT2018 13-51)(Web))　2018 ISSN：0913-5685 La-Ca-Cu-O系スピン熱伝導性薄膜の熱伝導率評価と電界効果 奈良由紀, 寺門信明, 高橋儀宏, 藤原巧 日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM)　31st　2018 熱流の電気制御に向けたLa-Ca-Cu-O系スピン熱伝導性薄膜の作製と非弾性光散乱 町田雄気, 寺門信明, 高橋儀宏, 藤原巧 応用物理学会東北支部学術講演会(CD-ROM)　73rd　2018 Synthesis of Nanocrystals by Glass-Ceramic Technique and Its Optical Functionality toward Clinical Medicine Application 高橋 儀宏, 寺門 信明, 尾上 紀子, 篠崎 毅, 藤原 巧 Journal of the Society of Inorganic Materials, Japan : セッコウ・石灰・セメント・地球環境の科学　24　(391)　415-421　2017/11 Publisher: 無機マテリアル学会 ISSN：1345-3769 ナノクリスタルセラミックス技術の深化 ガラスの不均一性によるナノ結晶化と機能性発現 高橋儀宏, 寺門信明, 藤原巧 セラミックス　51　(4)　234‐236-215　2016/04/01 Publisher: 日本セラミックス協会 ISSN：0009-031X Report on the 75th autumn meeting of the Japan Society of Applied Physics 寺門 信明 NEW GLASS　29　(3)　67-69　2014/11 Publisher: ニューガラスフォーラム ISSN：0914-6563 材料戦略講座 先端機能性材料と光技術 XI.不均質ガラスによる光学応用の新展開~アクティブ光ファイバーと光学的ストイキオメトリー~ 藤原巧, 山崎芳樹, 高橋儀宏, 井原梨恵, 寺門信明 セラミックス　49　(7)　604-607　2014/07/01 Publisher: 日本セラミックス協会 ISSN：0009-031X Science as art TERAKADO Nobuaki 応用物理　29　(3)　67-69　2014 ナノ構造カルコゲナイドの電子物性研究 田中啓司, 斎藤全, 寺門信明 東京工業大学応用セラミックス研究所共同利用研究報告書　2008　71　2009/06/30 ISSN：1345-7772 オキシカルコゲナイドガラスの光誘起現象 寺門信明, 田中啓司 東京工業大学応用セラミックス研究所共同利用研究報告書　2004　150-151　2005/06/30 ISSN：1345-7772 Show all ︎Show first 5 Books and Other Publications 1 次世代自動車の熱マネジメント 高橋 儀宏, 寺門 信明, 藤原 巧 2021/01 Presentations 87 化学強化ガラスの熱力学的モデル: 原子スケール描像からの巨視的応力値の導出 松本 宏太, 村井 大地, 寺門 信明, 木崎 和郎, 高橋 儀宏, 藤原 巧, 折原 秀治, 折原 芳男 The 34th Meeting on Glasses for Photonics　2024/01/31 アルカリガラスのイオン交換応力場による埋め込み結晶の相転移点制御 安達海渡, 寺門 信明, 藤原 巧 第63回ガラスおよびフォトニクス材料討論会　2023/11/28 化学強化ガラスと圧縮応力：エントロピー項を繰り込んだStuffingモデルの導出 寺門 信明, 松本 宏太, 村井 大地, 佐々木 隆成, 高橋 儀宏, 藤原 巧 第35回日本セラミックス協会秋季シンポジウム 化学強化ガラスにおける圧縮応力の熱力学的導出とラマン分光による検証 村井大地, 寺門信明, 高橋儀宏, 藤原 巧 第70回応用物理学会春季学術講演会　2023/03/16 スピン熱伝導を利用した熱伝導可変材料の創出 Invited さきがけ「熱制御」公開シンポジウム　2023/03/07 イオン交換下における化学強化ガラスの熱力学的モデルと圧縮応力の起源 寺門 信明, 村井 大地, 高橋 儀宏, 藤原 巧 第63回ガラスおよびフォトニクス材料討論会　2022/12/07 化学強化ガラスにおける残留圧縮応力の熱力学的理解 寺門信明, 佐々木隆成, 江袋信悟, 村井大地, 高橋儀宏, 藤原 巧 2022年第83回応用物理学会秋季学術講演会　2022/09/21 化学強化ガラスにおける新規応力評価法の開発 Invited 2022年度第1回ニューガラスセミナー「光の活用・光の世界－情報・計測・センシング－」　2022/08/31 Evaluations of atomic-scale residual strains from Raman peak positions in chemically strengthened glass 26th International Congress on Glass　2022/07/04 微分ラマンスペクトルを用いた 化学強化ガラスの構造調査 村井 大地, 寺門 信明, 高橋 儀宏, 藤原 巧, 折原秀治, 折原芳男 2022年度 第69回応用物理学会春季学術講演会　2022/03/22 化学強化ガラスにおける応力分布の局所評価技術の開発 ―顕微ラマン分光の利用と定式化― Invited 寺門信明, 高橋儀宏, 藤原 巧 2021年度ガラス表面・分析研究討論会 －ガラス表面における深さ方向の分析技術－　2022/02/18 イオン液体を用いたマグノン熱伝導性 La5Ca9Cu24O41単結晶の可逆的マグノン制御 石川 千歳, 寺門 信明, 高橋 儀宏, 藤原 巧 第82回応用物理学会秋季学術講演会　2021/09/13 P=O二重結合に着目した化学強化ガラスの応力算出と深さ依存性 江袋 信悟, 寺門 信明, 村井 大地, 高橋 儀宏, 藤原 巧, 折原 秀治, 折原 芳男 日本セラミックス協会 第34回秋季シンポジウム　2021/09/03 基板加熱またはポストアニールによるマグノン熱伝導薄膜の構造配向化 渡辺祥太, 寺門信明, 高橋儀宏, 藤原 巧 2021年第68回応用物理学会春季学術講演会　2021/03/18 化学強化ガラスにおけるラマン分光と局所応力評価式の構築 Invited 寺門信明, 高橋儀宏, 藤原 巧 第141回ニューガラスフォーラム若手懇談会　2021/02/05 Transparent glass-ceramics with a high thermal conductivity of 3.3Ｗ/(m Ｋ) Glass Meeting 2020 (Online) 熱伝導率と光透過率の向上に向けた MgO析出ガラスの構造調査 吉嶺季和, 寺門信明, 高橋儀宏, 藤原 巧 第81回応用物理学会秋季学術講演会　2020/09/08 酸化物ガラス・薄膜を用いた熱制御材料の開発 Invited 寺門信明, 高橋儀宏, 藤原巧 日本セラミックス協会第33回秋季シンポジウム　2020/09/04 マグノン熱伝導性La–Ca–Cu–O薄膜における熱キャリアの電界制御 奈良由紀, 寺門信明, 渡辺祥太, 高橋儀宏, 藤原 巧 第67回応用物理学会春季学術講演会（発表成立）　2020/02/28 さきがけ体験記 寺門 信明 戦略的創造研究推進事業申請に向けたCREST・さきがけ説明会（東北大学大学院 工学研究科）　2020/02/21 Point stress evaluation and structural investigation in chemically strengthened glass by micro-Raman spectroscopy Nobuaki Terakado, Ryusei Sasaki, Ebukuro Shingo, Yoshihiro Takahashi, Takumi Fujiwara, Shuji Orihara, Yoshio Orihara The 13th Paclfic Rim Conference of Ceramic Societies (Okinawa, Japan)　2019/10/31 Electric control of heat flow by using spin thermal conductivity material Invited Nobuaki Terakado The Future of Topological Materials (America, Princeton Center for Theoretical Science)　2019/10/02 2段階イオン交換ガラスの顕微ラマン分光:中心力モデルに基づいた圧縮応力評価 村井 大地, 寺門 信明, 高橋 儀宏, 藤原 巧, 折原 秀治, 折原 芳男 日本セラミックス協会 第34回秋季シンポジウム　2021/09/03 動的熱制御幅の向上を指向したマグノン熱伝導性ナノシートの創製 木下大也, 寺門信明, 高橋儀宏, 藤原巧 日本セラミックス協会 2021年年会　2021/03/23 マグノン熱伝導性配向薄膜におけるラマンスペクトルとその電界効果 石川千歳, 渡辺祥太, 寺門信明, 高橋儀宏, 藤原巧 日本セラミックス協会 2021年年会　2021/03/23 熱流の電界制御に向けたマグノン熱伝導性ナノシートの創製と形成機構解明 木下大也, 寺門信明, 高橋儀宏, 藤原巧 2021年第68回応用物理学会春季学術講演会　2021/03/18 動的な熱・温度制御を指向したイオン液体塗布La–Ca–Cu–O系配向膜の作製とRaman分光 石川千歳, 寺門信明, 高橋儀宏, 藤原巧 第12回⽇本セラミックス協会マテリアル・ファブリケーション・デザイン研究会ハイブリッドセミナー　2021/03/01 基板加熱によるスピン熱伝導薄膜の高配向成膜と熱伝導率の測定 渡辺祥太, 寺門信明, 高橋儀宏, 藤原巧 令和２年度日本セラミックス協会 東北北海道支部研究発表会　2020/11/13 La5Ca9Cu24O41 マグノン熱伝導結晶のナノシート化とその形成機構 木下大也, 寺門信明, 高橋儀宏, 藤原巧 第81回応用物理学会秋季学術講演会　2020/09/08 熱流の電界制御に向けたLa-Ca-Cu-O系スピン熱伝導性ナノシートの創製 木下大也, 寺門信明, 高橋儀宏, 藤原巧 第67回応用物理学会春季学術講演会（発表成立）　2020/02/28 透明性と3 W/(m·K)超の熱伝導率を有するMgO析出ガラスの作製 吉嶺季和, 寺門信明, 高橋儀宏, 藤原 巧 第67回応用物理学会春季学術講演会（発表成立）　2020/02/28 マグノン熱伝導結晶のナノシート化とその形成機構 木下大也, 寺門信明, 高橋儀宏, 藤原巧 2020年応用物理学会東北支部 第75回学術講演会　2020/12/03 熱流の電気制御を指向したスピン梯子系薄膜の作製と熱物性 奈良由紀, 寺門信明, 高橋儀宏, 藤原巧 令和元年度公益社団法人日本セラミックス協会 東北北海道支部研究発表会　2019/11/08 化学強化ガラスにおける残留応力と短距離構造の関係 寺門信明, 佐々木隆成, 江袋信悟, 高橋儀宏, 藤原巧, 折原秀治, 折原芳男 2019/09/18 Impact of electric field and grain size on thermal conductivity of spin thermal conductivity film Y. Nara, N. Terakado, Y. Takahashi, T. Fujiwara 2nd Global Forum on Advanced Materials and Technologies for Sustainable Development (Toronto, Canada)　2019/07/25 Preparation of thin film in low-dimensional spin system toward electric control of thermal conductivity N. Terakado, Y. Machida, Y. Nara, S. Watanabe, Y. Takahashi, T. Fujiwara 2nd Global Forum on Advanced Materials and Technologies for Sustainable Development (Toronto, Canada)　2019/07/25 Orientation of spin thermal conductive film of Sr-Cu-O system for active heat control S. Watanabe, N. Terakado, Y. Takahashi, T. Fujiwara 25th International Congress on Glass (Boston, USA)　2019/06/13 Novel evaluation method of local stress in chemically strengthened glass by using micro-Raman spectroscopy International-presentation R. Sasaki, N. Terakado, Y. Takahashi, T. Fujiwara, S. Orihara, Y. Orihara 25th International Congress on Glass (Boston, USA)　2019/06/13 Electric field-induced change of structure and thermal conductivity in spin thermal conductivity film N. Terakado, Y. Machida, Y. Nara, Y. Takahashi, T. Fujiwara 25th International Congress on Glass (Boston, USA)　2019/06 スピン熱伝導性La‐Ca‐Cu‐O薄膜における電界誘起構造変化 寺門信明, 町田雄気, 高橋儀宏, 藤原巧 応用物理学会春季学術講演会　2019/03/09 熱の電界制御に向けたLa-Ca-Cu-O系スピン熱伝導性薄膜の作製と周波数領域サーモリフレクタンス法による熱伝導性評価 奈良由紀, 寺門信明, 高橋儀宏, 藤原巧 第57回セラミックス基礎科学討論会　2019/01/17 La-Ca-Cu-O系スピン熱伝導薄膜における粒径と物性値の関係 奈良由紀, 寺門信明, 寺門信明, 高橋儀宏, 藤原巧 第66回応用物理学会春季学術講演会　2019/03/09 熱のアクティブ制御に向けたスピン熱伝導性薄膜の配向制御 渡辺祥太, 寺門信明, 寺門信明, 高橋儀宏, 藤原巧 第66回応用物理学会春季学術講演会　2019/03/09 b軸配向したスピン梯子系Sr₁₄Cu₂₄O₄₁スパッタ膜の形成機構とその熱伝導率 渡辺祥太, 奈良由紀, 寺門信明, 寺門信明, 高橋儀宏, 藤原巧 2019年第80回応用物理学会秋季学術講演会　2019/09/18 Non-destructive Stress Evaluation by Micro-Raman Spectroscopy and X-ray Diffraction in Chemically Strengthened Glass R. Sasaki, N. Terakado, Y. Takahashi, T. Fujiwara ICG Annual Meeting　2018/09/23 Fabrication of Multilayer Structure Including Spin Thermal Conductivity Film for Application to Electric-field Switching of Heat Y. Machida, Y. Nara, N. Terakado, Y. Takahashi, T. Fujiwara ICG Annual Meeting　2018/09/23 MgO飽和析出による透明かつ高熱伝導なガラス複合材料の開発 吉嶺季和, 小澤龍成, 寺門信明, 高橋儀宏, 藤原巧 日本セラミックス協会 第31回秋季シンポジウム　2018/09/06 Electric-field control of spin ordering and heat flow in spin thermal conductivity materiall N. Terakado, Y. Machida, Y. Nara, Y. Takahashi, T. Fujiwara Ceramic Materials and Components for Energy and Environmental Applications　2018/07/25 Fabrication of La–Ca–Cu–O spin thermal conductivity thin film having sandwich electrodes for application to electric-field control of heat flow Y. Machida, N. Teracado, Y. Takahashi, T. Fujiwara Ceramic Materials and Components for Energy and Environmental Applications　2018/07/22 In-depth Structural Investigation and Non-destructive Stress Evaluation in Chemically Strengthened Glass R. Sasaki, N. Teracado, Y. Takahashi, T. Fujiwara OSA Advanced Photonics Congress　2018/07/02 量子スピン鎖系高熱伝導材料を用いた熱輸送回路の創出 寺門信明 旭硝子財団研究助成成果発表会　2018/07 ITO/SiO₂/La‐Ca‐Cu‐O/ITO多層膜の作製と能動的熱流制御に向けた磁気秩序の電界制御 町田雄気, 寺門信明, 高橋儀宏, 藤原巧 応用物理学会春季学術講演会　2018/03/17 CO₂レーザー光照射による化学強化ガラスの易加工化とその機構解明 寺門信明, 佐々木隆成, 内田翔平, 高橋儀宏, 藤原巧 日本セラミックス協会年会　2018/03/01 熱流の電気制御に向けたLa-Ca-Cu-O系スピン熱伝導性薄膜の作製と非弾性光散乱 町田雄気, 寺門信明, 高橋儀宏, 藤原巧 第73回応用物理学会東北支部学術講演会　2018/12/06 La-Ca-Cu-O系スピン熱伝導性薄膜の電圧印加下における熱伝導率評価 奈良由紀, 寺門信明, 高橋儀宏, 藤原巧 電子情報通信学会技術研究報告　2018 スピン熱伝導材料による熱流の時空間制御 Invited ガラス科学技術研究会「ガラス・セラミックスにおける熱・音に関する新展開」　2017/12/09 熱を能動的に制御できる材料の開発 Invited 寺門信明 第49回日本セラミックス協会ガラス部会夏期若手セミナー　2017/08/22 Heat flow control by spin thermal conductivity materials having ordered/disordered structures N. Terakado, R. Takahashi, Y. Yamazaki, Y. Takahashi, T. Fujiwara The 12th Pacific Rim Conference on Ceramic and Glass Technology including Glass & Optical Materials Division Annual Meeting　2017/05/22 CO₂レーザー光照射による化学強化ガラスの構造緩和と易加工化 寺門信明, 内田翔平, 高橋儀宏, 藤原巧 日本セラミックス協会年会　2017/03/17 低次元量子スピン系化合物における能動的熱流制御 寺門信明, 高橋良輔, 山崎芳樹, 高橋儀宏, 藤原巧 応用物理学会春季学術講演会　2017/03/14 レーザー光照射による化学強化ガラスの局所構造変化 －易加工化とマッピング－ N. Terakado, S. Uchida, Y. Takahashi, T. Fujiwara The 27th Meeting on Glasses for Photonics　2017/02/03 Preparation of layer-type SrCuO2 by rf-magnetron sputtering and its laser-induced structure change to chain-type Invited N. Terakado, R. Takahashi, Y. Takahashi, T. Fujiwara International Conference on Small Science　2016/11/06 SrCuO₂スパッタ膜の光・熱誘起構造秩序化:熱流路パターニングと温度拡散イメージング 寺門信明, 高橋良輔, 山崎芳樹, 高橋儀宏, 藤原巧 応用物理学会秋季学術講演会　2016/09/13 低次元量子スピン系薄膜の光・熱誘起構造変化:熱流路パターニングとイメージング 寺門信明, 高橋良輔, 山崎芳樹, 高橋儀宏, 藤原巧 日本セラミックス協会秋季シンポジウム　2016/08/29 配向したSrCuO₂ナノ結晶膜における面内熱拡散率と構造の関係 寺門信明, 高橋良輔, 高橋儀宏, 藤原巧 応用物理学会春季学術講演会　2016/03/19 40th International Conference and Exposition on Advanced Ceramics and Composites (Florida, USA)) Invited 2016/01/27 Contribution of spinons to high thermal conductivity in SrCuO2-precipitated glass-ceramics N. Terakado, K. Watahabe, R. Takahashi, Y. Yokochi, Y. Takahashi, T. Fujiwara 11th International Symposium on Crystallization in Glasses and Liquids　2015/10 1次元スピン鎖化合物を含む結晶化ガラスにおけるスピン熱伝導性 寺門信明, 渡辺幸樹, 横地優大, 高橋儀宏, 藤原巧 日本セラミックス協会秋季シンポジウム　2015/09/01 Synthesis of spinon thermal conductive SrCuO2 by glass-crystallization method: Thermal and structural properties International-presentation Invited N. Terakado, K. Watanabe, T. Kawamata, Y. Yokochi, Y. Takahashi, Y. Koike, T. Fujiwara Energy Materials Nanotechnology Meeting on Ceramics 2015　2015/01/27 高熱伝導デバイスへの応用に向けたSr‐Cu‐O系結晶化ガラスの作製 寺門信明, 渡辺幸樹, 川股隆行, 横地優大, 高橋儀宏, 小池洋二, 藤原巧 ガラスおよびフォトニクス材料討論会講演要旨集　2014/11/13 アモルファスAgAsS₂薄膜光蓄電池:諸特性とメカニズム 寺門信明, 田中啓司 応用物理学会学術講演会　2011/08/16 AgAsS₂薄膜を用いた光蓄電池 寺門信明, 田中啓司 2011/03/09 Sn‐Mg‐O/金属膜の光着色現象 寺門信明, 田中啓司, 中澤明 応用物理学関係連合講演会　2011/03/09 Solar-Chemical Battery: Photo-charging and discharging characteristics in AgAsS2 film International-presentation N. Terakado, K. Tanaka 4th International Conference on Optical, Optoelectronic and Photonic Materials and Applications　2010/08 Ag/AsS₂非晶質膜における光ドーピングの外部電場効果 寺門信明, 田中啓司 応用物理学関係連合講演会　2010/03/29 Does the Charged Defect Exist in Nano-structured Oxy-chalcogenide Glass? Invited 2009/09/10 Does the Charged Defect Exist in Nano-structured Oxy-chalcogenide Glass? 寺門信明 ランダム系フォトエレクトロニクス研究会　2009/09/05 荷電欠陥は存在するか? 寺門信明, 田中啓司 応用物理学会学術講演会　2008/09/04 Ag-Photodoping in Nano-Structured GeO2-GeS2 glasses International-presentation N. Terakado, K. Tanaka 3rd International Conference on Optical, Optoelectronic and Photonic Materials and Applications　2008/07 GeO₂‐GeS₂ガラスにおけるフォトルミネッセンスと不均質構造の関係 寺門信明, 田中啓司 第55回応用物理学関係連合講演会　2008/03/29 GeO₂‐GeS₂ガラスにおける光誘起現象と構造の関連性 寺門信明, 田中啓司 応用物理学会学術講演会　2007/09/05 GeO₂‐GeS₂ガラスの光誘起現象 寺門信明, 田中啓司 応用物理学関係連合講演会　2007/03/29 Photo-Induced Phenomena in GeO2-GeS2 Glasses International-presentation N. Terakado, K. Tanaka 1st International Conference on Optical, Optoelectronic and Photonic Materials and Applications　2006/07 オキシカルコゲナイドガラスの光誘起現象 寺門信明, 田中啓司, 細野秀雄 東京工業大学応用セラミックス研究所共同利用研究報告書　2006/06/30 オキシカルコゲナイドガラスの光誘起現象 寺門信明 北海道大学21世紀 COEプログラム：トポロジー理工学の創成第8回若手研究者発表　2006/01 GeO₂ガラスの光誘起現象(光誘起体積変化) 寺門信明, 田中啓司 応用物理学会学術講演会　2005/09/11 GeO₂スパッター膜の光誘起現象 寺門信明, 田中啓司 応用物理学関係連合講演会　2003/03/27 Show all Show first 5 Industrial Property Rights 8 ガラス評価装置、ガラス評価方法 折原秀治, 折原芳男, 寺門信明, 藤原巧, 高橋儀宏 特許7458005 Property Type: Patent 化学強化ガラスの残留応力の評価方法 寺門信明, 藤原 巧, 高橋儀宏, 佐々木隆成 特許7318928 Property Type: Patent 二次電池 工藤 拓夫, 檜皮 清康, 井上 龍雄, 中澤 明, 寺門 信明 特許第6184941号 Property Type: Patent シート状電池のリペア装置 檜皮 清康, 出羽 晴匡, 中澤 明, 寺門 信明 特許第5990533号 Property Type: Patent 繰り返し充放電できる量子電池 工藤 拓夫, 中澤 明, 寺門 信明 特許第5963765号 Property Type: Patent 半導体プローブによる量子電池の試験装置及び試験方法 出羽 晴匡, 檜皮 清康, 中澤 明, 寺門 信明 特許5840697 Property Type: Patent ナノシートおよびナノシートの製造方法 木下大也, 寺門信明, 高橋儀宏, 藤原 巧 特許7485280 Property Type: Patent 波長変換光デバイスおよび波長変換光デバイスの製造方法 長能重博, 藤原巧, 高橋儀宏, 寺門信明 Property Type: Patent Show all Show first 5 Research Projects 10 低エネルギーフォトン励起による近赤外エンジニアリングと非侵襲デバイス応用 高橋 儀宏, 藤原 巧, 寺門 信明 Offer Organization: 日本学術振興会 System: 科学研究費助成事業 Category: 基盤研究(B) Institution: 東北大学 2023/04/01 - 2026/03/31 EVの次世代熱管理を指向したマグノン熱伝導性ナノシート大量合成技術の開発 Offer Organization: 科学技術振興機構（JST） System: 大学発新産業創出基金事業 可能性検証 2023/10 - 2025/03 化学強化ガラスにおける原⼦スケール強化モデルの構築と実強度予測 Competitive 寺門 信明, 藤原 巧 Offer Organization: ガラス産業連合会・ニューガラスフォーラム System: 2022 年度ガラス研究振興プログラム 2022/04 - 2025/03 スピン熱伝導を利用した熱伝導可変材料の創出 Competitive 寺門 信明 Offer Organization: 科学技術振興機構 System: さきがけ 2018/10 - 2022/03 Dynamic control of heat flow using spin thermal conductivity film Competitive TERAKADO Nobuaki Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (A) Category: Grant-in-Aid for Young Scientists (A) Institution: Tohoku University 2017/04 - 2021/03 More details Close Owing to miniaturization and high integration in semiconductor devices, the integrated heat and its fluctuation causes degradation of performance and precision. To solve it, we aim to develop a new material that can electrically control heat flow. In this work, we focused on spin ladder materials (La5Ca9Cu24O41) whose heat carrier is a unique particle, magnon. We proposed and fabricated a prototype for the dynamic control and demonstrated that magnons and their thermal conduction can be electrically controlled by an application of voltage via an ionic liquid. 量子スピン鎖系高熱伝導材料を用いた熱輸送回路の創出 Competitive 寺門 信明 Offer Organization: 旭硝子財団 System: 研究奨励 2016/04 - 2018/03 Fabrication of spin thermal conductivity glass-ceramics for application to high thermal conductivity devices Competitive Terakado Nobuaki Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B) Category: Grant-in-Aid for Young Scientists (B) Institution: Tohoku University 2015/04/01 - 2017/03/31 More details Close Recently, low-temperature, scattered waste heat in electronic devices has been regarded as a novel energy resource. To scavenge and reuse the thermal energy effectively, novel heat transport materials and structures are required. In this study, focusing on spin thermal conductivity materials possessing fast heat transport due to spin ordering, and glass and glass-ceramics, being of high shapeability, and additionally nano-crystalline film, we develop the novel thermal management materials. Consequently, we have developed the glass-ceramics having the highest thermal conductivity reported to date and have succeeded in fabrication of the heat transport paths by means of the laser patterning. 高熱伝導性結晶化ガラスの創製 Offer Organization: トーキン科学技術振興財団 System: トーキン科学技術賞 2016/04 - ナノ構造カルコゲナイドの物性研究 田中 啓司, 寺門 信明 Offer Organization: 東京工業大学応用セラミックス研究所 System: 共同利用研究 Category: 一般共同研究C Institution: 北海道大学 2008 - オキシカルコゲナイドガラスの光誘起現象 Competitive 田中 啓司, 寺門 信明 Offer Organization: 東京工業大学応用セラミックス研究所 System: 共同利用研究 Category: 一般共同研究C Institution: 北海道大学 2004 - 2005 Show all Show first 5 Teaching Experience 4 応用物理計測学　東北大学 光物性物理学　東北大学 応用物理学実験A, B　東北大学 電磁気学Ｉ演習　東北大学 Works 3 蒼鉛擬態～光の昆虫（応用物理学会 第17回JSAPフォト&イラストコンテスト） OhHyeok Kwon, 高橋儀宏, 寺門信明, 藤原 巧 2021/03 - Type: Artistic work 氷河～架空の惑星にて（応用物理学会 第11回JSAPフォト＆イラストコンテスト） 舟嶋康祐, 高橋儀宏, 寺門信明, 藤原 巧 2018/03 - Type: Artistic work 緑橙～幻燈螢光（応用物理学会 第4回JSAPフォトコンテスト） 星野愛信, 高橋儀宏, 寺門信明, 藤原 巧 2014/09 - Type: Artistic work Social Activities 5 【ブース出展】学都「仙台・宮城」サイエンスマップ2019～光編～（NPO法人natural science主催） 【出展内容】ふしぎな光～蛍光と残光～ 2019/07/14 - 【ブース出展】学都「仙台・宮城」サイエンスデイ2019（NPO法人natural science主催） 【出展内容】体感しよう、光のふしぎ！ 2019/07/14 - 【ブース出展】学都「仙台・宮城」サイエンスマップ2018～光編～（NPO法人natural science主催） 【出展内容】ふしぎな光～蛍光と残光～ 2018/07/15 - 【ブース出展】学都「仙台・宮城」サイエンスデイ2018（NPO法人natural science主催） 【出展内容】体感しよう、光のふしぎ！ 2018/07/15 - 薄膜太陽蓄電池（Solar-Chemical Battery） 人間・社会・自然と科学技術展 2010 - Media Coverage 29 世界初、スピン熱伝導物質をナノシート化 コンバーテック 2022/11 Type: Newspaper, magazine スピン熱伝導ナノシート 電子部品を効率放熱 日刊工業新聞 2022/10 Type: Newspaper, magazine 東北大とJST、スピン熱伝導物質のナノシート化に成功 日本経済新聞・電子版 2022/10 Type: Internet 東北大、次世代排熱制御用のスピン梯子系銅酸化物の配向製膜技術を開発 マイナビニュース 2022/08 Type: Internet 東北大、電子デバイスの排熱制御に向けた「スピン梯子系銅酸化物」の配向成膜技術を開発 日本経済新聞・電子版 2022/08 Type: Internet 東北大，熱伝導を電気で制御する手法を開発 OPTRONICS ONLINE 2020/09 Type: Internet 東北大、スピン熱伝導物質を用いた熱伝導の新しい制御法の実証に成功 日本経済新聞・電子版 2020/09 Type: Internet 熱伝導を電気で制御する次世代熱マネジメント向け手法を東北大などが開発 マイナビニュース 2020/08 Type: Internet 割れないスマホを実現するスゴイ技術 子供の科学　コカトピ！ 2020/05 Type: Newspaper, magazine 化学強化ガラス 評価手法を開発 日本経済新聞・電子版 2020/03 Type: Internet 化学強化ガラス評価手法を開発 日本経済新聞 2020/03 Type: Newspaper, magazine 東北大が強化ガラスの新しい評価方法を開発。ガラスの構造をマイクロメートル単位で分析 Engadget 2020/02 Type: Internet 東北大ら，化学強化ガラスの残留応力を評価 OPTRONICS ONLINE 2020/02 Type: Internet 化学強化ガラス 局所評価「残留圧縮応力」分布求める 東北大 日刊工業新聞 2020/02 Type: Newspaper, magazine 东北大学通过照射脉冲近红外光“低侵袭、高精度”测量核心体温 日本国立研究开发法人科学技术振兴机构 2022/07 Type: Internet 臓器内の生体深部温度 体に低負担で数秒測定 日刊工業新聞 2022/06 Type: Newspaper, magazine Sensing internal organ temperature with shining lights, TOHOKU UNIVERSITY EurekAlert!（アメリカ科学振興協会） 2020/03 Type: Internet Sensing Internal Organ Temperature with Shining Lights AlphaGalileo 2020/03 Type: Internet Sensing Internal Organ Temperature with Shining Lights Asia Research News 2020/03 Type: Internet Sensing organ temperature with luminescent powder Labonline 2020/03 Type: Internet Sensing internal organ temperature with shining lights Bioengineer 2020/03 Type: Internet Non-invasively monitoring internal organ temperature with shining lights Medical News 2020/03 Type: Internet 東北大、化学強化ガラスの局所評価 「残留圧縮応力」分布求める 日刊工業新聞・電子版 2020/02 Type: Internet 残光体用いた生体深部温度の低侵襲な新規計測技術を確立 東北大と仙台医療センターが共同研究 科学新聞 2020/02 Type: Newspaper, magazine 東北大など、残光による生体深部温度の新規計測技術を確立 日本経済新聞・電子版 2020/02 Type: Internet 東北大ら、残光で生体深部温度の計測技術を確立 OPTRONICS ONLINE 2020/02 Type: Internet 東北大、ガラス材料による全固体型潜熱蓄熱材料の創製に成功 日本経済新聞・電子版 2018/02 Type: Internet A marriage of materials and optics Nature Photonics 2017/05 Type: Newspaper, magazine 透明多結晶体セラミックスに、結晶化ガラス法によりポッケルス効果発現 Laser Focuse World 2015/08 Type: Internet Show all Show first 5 Academic Activities 1 科学技術振興機構 SciFoS活動メンバー 2019/04 - 2020/03 Other 15 JSTプレスリリース：2022年10月14日 More details Close スピン熱伝導物質のナノシート化に成功 ～熱の流量を操る「熱伝導可変材料」の開発を目指して～ https://www.tohoku.ac.jp/japanese/2022/10/press20221013-01-spin.html【対象研究】H. Kinoshita et al., npj 2D Mater. Appl. https://www.nature.com/articles/s41699-022-00344-2 東北大学プレスリリース：2022年10月14日 More details Close スピン熱伝導物質のナノシート化に成功 ～熱の流量を操る「熱伝導可変材料」の開発を目指して～ https://www.tohoku.ac.jp/japanese/2022/10/press20221013-01-spin.html【対象研究】H. Kinoshita et al., npj 2D Mater. Appl. https://www.nature.com/articles/s41699-022-00344-2 東北大学プレスリリース：2022年8月23日 More details Close 電子デバイスの排熱制御に向けた「スピン梯子系銅酸化物」の配向成膜技術を開発 ─ 半導体シリコン基板にも低温で容易に作製 ─ 【対象研究】S. Watanabe et al., Appl. Sur. Sci. 604, 154444 (2022). https://www.tohoku.ac.jp/japanese/2020/09/press20200903-01-netsu.html 熱制御に関する論文がScientific ReportsのEditor&＃39;s choiseに選定 More details Close 【対象論文】Dynamic control of heat flow using a spin-chain ladder cuprate film and an ionic liquid, N. Terakado et al. Sci. Rep. 10, 14468 (2020). 第81回応用物理学会秋季学術講演会の発表が応用物理学会フォトニクス分科会会誌「フォトニクスニュース」のEditor&＃39;s Picksに選定 More details Close 【発表内容】吉嶺季和, 寺門信明, 高橋儀宏, 藤原巧 , 熱伝導率と光透過率の向上に向けた MgO析出ガラスの構造調査 (第81回応用物理学会秋季学術講演会 2020年9月8日) JSTプレスリリース：2020年9月3日 More details Close 「熱伝導を電気で制御する新手法を開発 ～熱流を自在に制御して、次世代の熱マネジメントへ～」 【対象研究】N. Terakado et al., Sci. Rep. 10, 14468 (2020). https://www.jst.go.jp/pr/announce/20200902-2/index.html 東北大学プレスリリース：2020年9月3日 More details Close 「熱伝導を電気で制御する新手法を開発 ～熱流を自在に制御して、次世代の熱マネジメントへ～」 【対象研究】N. Terakado et al., Sci. Rep. 10, 14468 (2020). https://www.tohoku.ac.jp/japanese/2020/09/press20200903-01-netsu.html 東北大学プレスリリース：2020年2月24日 More details Close 「化学強化ガラスの強さを局所評価できる新手法を開発 ～落としても割れないスマホガラスの実現に向けて～」 【対象研究】N. Terakado et al., Commun. Phys. 3, 37 (2020). 東北大学プレスリリース：2022年6月21日 More details Close 生体深部温度を低侵襲かつ迅速に計測できる技術を開発 - 生体深部温度を低侵襲かつ迅速に計測できる技術を開発 -【対象研究】M. Ohashi et al., Sci. Rep. 12, 8587 (2022); A. Sato et al., Ceram. Int. (in press) 東北大学プレスリリース：2022年6月21日 More details Close 生体深部温度を低侵襲かつ迅速に計測できる技術を開発 - 生体深部温度を低侵襲かつ迅速に計測できる技術を開発 - 【対象研究】M. Ohashi et al., Sci. Rep. 12, 8587 (2022); A. Sato et al., Ceram. Int. 48, 25587-25591 (2022). 東北大学プレスリリース：2020年9月7日 More details Close 結晶化ガラス材料における最大の光変調性能を実現 - 光通信網へ導入可能な柔軟かつ高度な光波制御デバイスの実現が可能に - 【対象研究】H. Okamoto et al., J. Eur. Ceram. Soc. 40, 5576-5581 (2020). 東北大学プレスリリース：2020年2月13日 More details Close 「残光による生体深部温度の新規計測技術を確立 ～高度先進医療および脳機能の解明に貢献～」 【対象研究】M. Ohashi et al., Sci. Rep. 10, 2242 (2020). Advanced Photonics Congree（米国光学会）の研究発表がPost-Deadline Paperに選定 More details Close 【発表内容】Y. Hayashibara et al., &＃34;Second-Harmonic Generation from Radially-Crystallized Glass-Ceramic Fiber,&＃34; Bragg Gratings, Photosensitivity and Poling in Waveguides and Materials (BGPP), OSA Advanced Photonics Congress, (ETH Zurich, Zürich, Switzerland, 2-5 July, 2018). 東北大学プレスリリース：2018年2月7日 More details Close 「ガラス材料による全固体型潜熱蓄熱材料の創製に成功 ～生産性・耐久性に優れた熱マネージメントの要素技術開発に向けて～」 【対象研究】K. Muramoto et al., Sci. Rep. 8, 2275 (2018). 東北大学プレスリリース：2015年8月18日 More details Close 「透明多結晶体セラミックスに、結晶化ガラス法によりポッケルス効果の発現に成功 ～光を操るアクティブな光デバイスが安価かつ大量生産可能に～」 【対象研究】K. Yamaoka et al., Sci. Rep. 5, 12176 (2015). Show all Show first 5