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論文 TSV

2025
  1. Koichi Oyanagi, Hossein Sepehri-Amin, Kenta Takamori, Terumasa Tadano, Takumi Imamura, Ren Nagasawa, Krishnan Mahalingam, Takamasa Hirai, Fuyuki Ando, Yuya Sakuraba, Satoru Kobayashi, Ken-ichi Uchida. Simultaneous achievement of large anomalous Nernst effect and reduced thermal conductivity in sintered polycrystalline topological Heusler ferromagnets. Acta Materialia. 296 (2025) 121239 10.1016/j.actamat.2025.121239 Open Access
  2. Zulfa Hilmi Kautsar, Babu Madavali, Takamasa Hirai, Ken-ichi Uchida, Hossein Sepehri-Amin. Impact of intergranular phase variations on the anomalous Nernst effect in Nd-Fe-B permanent magnets. Energy Materials. 5 [10] (2025) 500129 10.20517/energymater.2025.26 Open Access
  3. Fuyuki Ando, Takamasa Hirai, Hiroto Adachi, Ken-ichi Uchida. Adiabatic transverse thermoelectric conversion enhanced by heat current manipulation in artificially tilted multilayers. Physical Review Applied. 23 [6] (2025) 064061 10.1103/gqvy-p5p1
  4. Fuyuki Ando, Takamasa Hirai, Abdulkareem Alasli, Hossein Sepehri-Amin, Yutaka Iwasaki, Hosei Nagano, Ken-ichi Uchida. Multifunctional composite magnet realizing record-high transverse thermoelectric generation. Energy & Environmental Science. 18 [9] (2025) 4068-4079 10.1039/d4ee04845h Open Access
  5. Takumi Imamura, Takamasa Hirai, Koichi Oyanagi, Ryo Iguchi, Kenta Takamori, Satoru Kobayashi, Ken-ichi Uchida. Quantitative noncontact measurement of thermal Hall angle and transverse thermal conductivity by lock-in thermography. Physical Review Applied. 23 [2] (2025) 024018 10.1103/physrevapplied.23.024018 Open Access
2024
  1. Takamasa Hirai, Fuyuki Ando, Hossein Sepehri-Amin, Ken-ichi Uchida. Hybridizing anomalous Nernst effect in artificially tilted multilayer based on magnetic topological material. Nature Communications. 15 [1] (2024) 9643 10.1038/s41467-024-53723-2 Open Access
  2. Ravi Gautam, Takamasa Hirai, Abdulkareem Alasli, Hosei Nagano, Tadakatsu Ohkubo, Ken-ichi Uchida, Hossein Sepehri-Amin. Creation of flexible spin-caloritronic material with giant transverse thermoelectric conversion by nanostructure engineering. Nature Communications. 15 [1] (2024) 2184 10.1038/s41467-024-46475-6 Open Access
  3. Takuma Itoh, Yusuke Kozuka, Takamasa Hirai, Ken‐ichi Uchida. Enhancement of Transverse Thermoelectric Conversion by Interface‐Induced Spin Current in Ferromagnetic Metal/Nonmagnetic Insulator Hybrid‐Structure. Advanced Functional Materials. 34 [49] (2024) 2409557 10.1002/adfm.202409557 Open Access
  4. Rajkumar Modak, Takamasa Hirai, Yuya Sakuraba, Seiji Mitani, Koichi Oyanagi, Takumi Yamazaki, Takeshi Seki, Ken‐ichi Uchida. High‐Throughput Optimization of Magnetoresistance Materials Based on Lock‐In Thermography. Advanced Physics Research. 3 [8] (2024) 2400021 10.1002/apxr.202400021 Open Access
  5. Masayuki Murata, Takamasa Hirai, Takeshi Seki, Ken-ichi Uchida. Zero-magnetic-field operation of ordinary-Nernst-effect-based transverse thermoelectric module using embedded permanent magnets. Applied Physics Letters. 124 [19] (2024) 193901 10.1063/5.0202818 Open Access
  6. Fuyuki Ando, Takamasa Hirai, Ken-ichi Uchida. Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effect. APL Energy. 2 [1] (2024) 016103 10.1063/5.0180506 Open Access
  7. Takumi Yamazaki, Takamasa Hirai, Takashi Yagi, Yuichiro Yamashita, Ken-ichi Uchida, Takeshi Seki, Koki Takanashi. Quantitative measurement of figure of merit for transverse thermoelectric conversion in Fe/Pt metallic multilayers. Physical Review Applied. 21 [2] (2024) 024039 10.1103/physrevapplied.21.024039 Open Access
  8. Shun Noguchi, Kohei Fujiwara, Yuki Yanagi, Michi-To Suzuki, Takamasa Hirai, Takeshi Seki, Ken-ichi Uchida, Atsushi Tsukazaki. Bipolarity of large anomalous Nernst effect in Weyl magnet-based alloy films. Nature Physics. 20 [2] (2024) 254-260 10.1038/s41567-023-02293-z Open Access
  9. Ken‐ichi Uchida, Takamasa Hirai, Fuyuki Ando, Hossein Sepehri‐Amin. Hybrid Transverse Magneto‐Thermoelectric Cooling in Artificially Tilted Multilayers. Advanced Energy Materials. 14 [3] (2024) 2302375 10.1002/aenm.202302375 Open Access
2022
  1. Rajkumar Modak, Yuya Sakuraba, Takamasa Hirai, Takashi Yagi, Hossein Sepehri-Amin, Weinan Zhou, Hiroto Masuda, Takeshi Seki, Koki Takanashi, Tadakatsu Ohkubo, Ken-ichi Uchida. Sm-Co-based amorphous alloy films for zero-field operation of transverse thermoelectric generation. Science and Technology of Advanced Materials. 23 [1] (2022) 10.1080/14686996.2022.2138538 Open Access
  2. Takamasa Hirai, Yuya Sakuraba, Ken-ichi Uchida. Observation of the giant magneto-Seebeck effect in a metastable Co50Fe50/Cu multilayer. Applied Physics Letters. 121 [16] (2022) 10.1063/5.0118382
  3. Abdulkareem Alasli, Takamasa Hirai, Hosei Nagano, Ken-ichi Uchida. Measurements of thermoelectric figure of merit based on multi-harmonic thermal analysis of thermographic images. Applied Physics Letters. 121 [15] (2022) 10.1063/5.0105282
  4. Weinan Zhou, Takamasa Hirai, Ken-ichi Uchida, Yuya Sakuraba. Seebeck-driven transverse thermoelectric generation in on-chip devices. Journal of Physics D: Applied Physics. 55 [33] (2022) 335002 10.1088/1361-6463/ac717a
  5. Ren Nagasawa, Koichi Oyanagi, Takamasa Hirai, Rajkumar Modak, Satoru Kobayashi, Ken-ichi Uchida. Anomalous Ettingshausen effect in iron–carbon alloys. Applied Physics Letters. 121 [6] (2022) 10.1063/5.0103248
  6. Takamasa Hirai, Ryo Iguchi, Asuka Miura, Ken‐ichi Uchida. Elastocaloric Kirigami Temperature Modulator. Advanced Functional Materials. 32 [28] (2022) 2201116 10.1002/adfm.202201116
  7. Takumi Yamazaki, Takeshi Seki, Rajkumar Modak, Keita Nakagawara, Takamasa Hirai, Keita Ito, Ken-ichi Uchida, Koki Takanashi. Thickness dependence of anomalous Hall and Nernst effects in Ni-Fe thin films. Physical Review B. 105 [21] (2022) 214416 10.1103/physrevb.105.214416
  8. Atsushi Takahagi, Takamasa Hirai, Ryo Iguchi, Keita Nakagawara, Hosei Nagano, Ken-ichi Uchida. Spin Peltier effect and its length scale in Pt/YIG system at high temperatures. Applied Physics Express. 15 [6] (2022) 063002 10.35848/1882-0786/ac6fae
  9. Hayato Mizuno, Rajkumar Modak, Takamasa Hirai, Atsushi Takahagi, Yuya Sakuraba, Ryo Iguchi, Ken-ichi Uchida. Deposition temperature dependence of thermo-spin and magneto-thermoelectric conversion in Co2MnGa films on Y3Fe5O12 and Gd3Ga5O12. Applied Physics Letters. 120 [20] (2022) 202401 10.1063/5.0091285
2021
  1. Takamasa Hirai, Kento Hasegawa, Shinya Ota, Motohiro Suzuki, Tomohiro Koyama, Daichi Chiba. Modification of interfacial spin-orbit torque in Co/Pt/oxide hybrid structures. Physical Review B. 104 [13] (2021) 134401 10.1103/physrevb.104.134401
  2. Takamasa Hirai, Rajkumar Modak, Asuka Miura, Takeshi Seki, Koki Takanashi, Ken-ichi Uchida. Temperature dependence of anisotropic magneto-Seebeck effect in NiPt alloys. Applied Physics Express. 14 [7] (2021) 073001 10.35848/1882-0786/ac057c
  3. Hiroyasu Nakayama, Bin Xu, Sotaro Iwamoto, Kaoru Yamamoto, Ryo Iguchi, Asuka Miura, Takamasa Hirai, Yoshio Miura, Yuya Sakuraba, Junichiro Shiomi, Ken-ichi Uchida. Above-room-temperature giant thermal conductivity switching in spintronic multilayers. Applied Physics Letters. 118 [4] (2021) 042409 10.1063/5.0032531
  4. Takamasa Hirai, Hossein Sepehri-Amin, Kento Hasegawa, Tomohiro Koyama, Ryo Iguchi, Tadakatsu Ohkubo, Daichi Chiba, Ken-ichi Uchida. Strain-induced cooling-heating switching of anisotropic magneto-Peltier effect. Applied Physics Letters. 118 [2] (2021) 022403 10.1063/5.0034858
2020
  1. Takamasa Hirai, Yuki Hibino, Kento Hasegawa, Makoto Kohda, Tomohiro Koyama, Daichi Chiba. Voltage control of spin–orbit torque in Pd/Co/Pd/HfO x. Applied Physics Express. 13 [12] (2020) 123005 10.35848/1882-0786/abcd71
  2. Asuka Miura, Keisuke Masuda, Takamasa Hirai, Ryo Iguchi, Takeshi Seki, Yoshio Miura, Hiroki Tsuchiura, Koki Takanashi, Ken-ichi Uchida. High-temperature dependence of anomalous Ettingshausen effect in SmCo5-type permanent magnets. Applied Physics Letters. 117 [8] (2020) 082408 10.1063/5.0023111

書籍 TSV

会議録 TSV

口頭発表 TSV

2024
  1. HIRAI, Takamasa, IGUCHI, Ryo, 三浦 飛鳥, UTO, Koichiro, EBARA, Mitsuhiro, UCHIDA, Kenichi. Elastocaloric Kirigami Temperature Modulator. Summit of Materials Science 2024 and GIMRT User Meeting 2024. 2024
  2. MAKINO, Fuya, HIRAI, Takamasa, 志賀 拓麿, SUTO, Hirofumi, 藤久 裕司, 大柳 洸一, 小林 悟, SASAKI, Taisuke, 八木 貴志, UCHIDA, Kenichi, SAKURABA, Yuya. Enhancement of thermal conductivity change induced by magneto-thermal resistance effect in CoFe/Cu magnetic multilayers. The IEEE Around-the-Clock Around-the-Globe Magnetics Conference . 2024
  3. 牧野 楓也, 平井 孝昌, 志賀拓麿, 首藤 浩文, 藤久裕司, 大柳洸一, 小林悟, 佐々木 泰祐, 八木貴志, 内田 健一, 桜庭 裕弥. CoFe/Cu多層膜の磁気熱抵抗効果による巨大熱伝導率変化. 日本磁気学会学術講演会. 2024
  4. IMAMURA, Takumi, HIRAI, Takamasa, UCHIDA, Kenichi. Low-temperature measurements of the anomalous Ettingshausen effect using lock-in thermography. 第85回応用物理学会秋季学術講演会 . 2024
  5. GAUTAM, Ravi, HIRAI, Takamasa, Alasli Abdulkareem, Hosei Nagano, OHKUBO, Tadakatsu, UCHIDA, Kenichi, SEPEHRI AMIN, Hossein. Large transverse thermoelectric conversion by nanostructure-engineered spin-caloritronic amorphous alloy. International Conference on Magnetism 2024. 2024
  6. ANDO, Fuyuki, HIRAI, Takamasa, Abdulkareem Alasli, SEPEHRI AMIN, Hossein, IWASAKI, Yutaka, 長野 方星, UCHIDA, Kenichi. Giant transverse thermoelectric generation in multifunctional composite permanent magnets. International Conference on Magnetism 2024. 2024 招待講演
  7. HIRAI, Takamasa, 森田 利明, ビスワス スブラト, UZUHASHI, Jun, 八木 貴志, 山下 雄一郎, KUSHWAHA, Varun, MAKINO, Fuya, MODAK, Rajkumar, SAKURABA, Yuya, OHKUBO, Tadakatsu, Rulei Guo, Bin Xu, 塩見 淳一郎, 千葉 大地, UCHIDA, Kenichi. Magnon-mediated thermal transport engineering at room temperature. International Conference on Magnetism 2024. 2024 招待講演
  8. Jiachen Zhang, HIRAI, Takamasa, Pukun Tan, IGUCHI, Ryo, Fuhua Zhang, Xianzhe Chen, Cheng Song, Dazhi Hou, UCHIDA, Kenichi. Lock-in Thermography for Non-Destructive Phase Boundary Resolving in Metallic Materials . Spin caloritronics XIII. 2024
  9. ITOH, Takuma, KOZUKA, Yusuke, HIRAI, Takamasa, UCHIDA, Kenichi. Enhancement of transverse thermoelectric conversion by interface-induced thermal spin current in Ni/Bi2WO6 hybrid structure. 2024年第71回応用物理学会春季学術講演会. 2024
  10. 藤原 宏平, 野口 駿, 柳 有起, 鈴木 通人, HIRAI, Takamasa, 関 剛斎, UCHIDA, Kenichi, 塚﨑 敦. Zero-field operation of anomalous Nernst effect-type thermopile device using magnetic Weyl semimetal Co3Sn2S2 and its alloy thin films. 2024年第71回応用物理学会春季学術講演会. 2024
  11. 山崎 匠, HIRAI, Takamasa, 八木 貴志, 山下 雄一郎, UCHIDA, Kenichi, 関 剛斎, 高梨 弘毅. Quantitative measurement of figure of merit for transverse thermoelectric conversion in Fe/Pt metallic multilayers. The 27th Symposium on the Physics and Applications of Spin-related Phenomena in Semiconductors/第27回半導体スピン工学の基礎と応用. 2024
  12. 藤原 宏平, 野口 駿, 柳 有起, 鈴木 通人, HIRAI, Takamasa, 関 剛斎, UCHIDA, Kenichi, 塚﨑 敦. Sign Reversal of Anomalous Nernst Coefficient in Co3Sn2S2 by Fermi-Level Tuning across Weyl Point. CEMS Symposium on Emergent Quantum Materials 2024. 2024
2023
  1. HIRAI, Takamasa, IGUCHI, Ryo, 三浦 飛鳥, UTO, Koichiro, EBARA, Mitsuhiro, UCHIDA, Kenichi. Flexible Elastocaloric Kirigami Temperature Modulator. MRM2023/IUMRS-ICA2023. 2023
  2. ANDO, Fuyuki, HIRAI, Takamasa, SEPEHRI AMIN, Hossein, UCHIDA, Kenichi. Transverse Thermoelectric Generation Using Permanent Magnets. MRM2023/IUMRS-ICA2023. 2023 招待講演
  3. 山崎 匠, HIRAI, Takamasa, 八木 貴志, 山下 雄一郎, UCHIDA, Kenichi, 関 剛斎, 高梨 弘毅. Evaluation of Figure of Merit for the Transverse Thermoelectric Conversion in Fe/Pt Metallic Superlattices. 東北大学 金属材料研究所講演会(第145回金研講演会). 2023
  4. 藤原 宏平, 野口 駿, 柳 有起, 鈴木 通人, 平井 孝昌, 関 剛斎, 内田 健一, 塚﨑 敦. Co3Sn2S2系トポロジカル強磁性体薄膜の異常ネルンスト効果を用いたサーモパイル素子. 東北大学 金属材料研究所講演会(第145回金研講演会). 2023
  5. MODAK, Rajkumar, HIRAI, Takamasa, SAKURABA, Yuya, MITANI, Seiji, OYANAGI Koichi, SEKI, Takeshi, UCHIDA, Kenichi. High-throughput investigation of magnetoresistance materials based on lock-in thermography. International Conference on Magnetic Materials and Applications (ICMAGMA-2023). 2023
  6. 山崎 匠, HIRAI, Takamasa, 八木 貴志, 山下 雄一郎, UCHIDA, Kenichi, 関 剛斎, 高梨 弘毅. Evaluation of Figure of Merit for the Transverse Thermoelectric Conversion in Fe/Pt Metallic Superlattices. The 7th Symposium for the Core Research Clusters for Materials Science and Spintronics and the 6th Symposium on International Joint Graduate Program in Materials Science and Spintronics. 2023
  7. 山崎 匠, 平井 孝昌, 八木 貴志, 内田 健一, 関 剛斎, 高梨 弘毅. Fe/Pt金属人工格子における横型熱電変換の性能指数. 第47回 日本磁気学会学術講演会. 2023
  8. HIRAI, Takamasa. Active and selective temperature control using mechanical strain. 第47回 日本磁気学会学術講演会. 2023 招待講演
  9. 安藤 冬希, 平井 孝昌, セペリ アミン ホセイン, 内田 健一. SmCo/BiSbTe傾斜積層体による横型熱電永久磁石の実証. 第20回日本熱電学会学術講演会. 2023
  10. 内田 健一, 平井 孝昌, セペリ アミン ホセイン. 人工傾斜型積層体におけるハイブリッド横型磁気熱電冷却. 第20回 日本熱電学会学術講演会. 2023
  11. 山崎 匠, HIRAI, Takamasa, 八木 貴志, UCHIDA, Kenichi, 関 剛斎, 高梨 弘毅. Figure of merit for transverse thermoelectric conversion in Fe/Pt metallic superlattices. 第84回応用物理学会秋季学術講演会. 2023
  12. IMAMURA, Takumi, 大柳 洸一, HIRAI, Takamasa, IGUCHI, Ryo, 髙森健太, 小林悟, UCHIDA, Kenichi. Quantitative measurement of the thermal Hall effect based on magnetic-field-modulated lock-in thermography. 第84回応用物理学会秋季学術講演会. 2023
  13. 安藤 冬希, 平井 孝昌, セペリ アミン ホセイン, 内田 健一. SmCo/BiSbTe傾斜積層体による横型熱電永久磁石の実証. 第84回応用物理学会秋季学術講演会. 2023
  14. HIRAI, Takamasa, 森田 利明, ビスワス スブラト, UZUHASHI, Jun, 八木 貴志, 山下 雄一郎, KUSHWAHA, Varun, MODAK, Rajkumar, SAKURABA, Yuya, OHKUBO, Tadakatsu, Rulei Guo, Bin Xu, 塩見 淳一郎, 千葉 大地, UCHIDA, Kenichi. Spin-current-induced non-equilibrium change in thermal conductivity and interfacial thermal resistance at room temperature. 第84回応用物理学会秋季学術講演会. 2023
  15. 平井 孝昌. スピントロニクス材料におけるナノスケール熱伝導計測と制御. ナノスケールソフト磁性体の創製とデバイス応用調査専門委員会 第3回ナノ磁性研究会. 2023 招待講演
  16. 平井 孝昌. スピントロニクス材料におけるナノスケール熱伝導計測. 第1回 光・熱・電気と磁気の相互作用の活用技術調査専門委員会 研究会. 2023 招待講演
  17. 高森健太, 大柳 洸一, IMAMURA, Takumi, NAGASAWA, Ren, MAHALINGAM, Krishnan, HIRAI, Takamasa, ANDO, Fuyuki, SAKURABA, Yuya, 小林悟, UCHIDA, Kenichi. Anomalous Nernst effect in sintered Co2MnGa slab. SPIN CALORITRONICS XII. 2023
  18. NAGASAWA, Ren, 大柳 洸一, HIRAI, Takamasa, MODAK, Rajkumar, 小林 悟, UCHIDA, Kenichi. Measurements of the anomalous Ettingshausen effect in iron-carbon alloys using lock-in thermography. SPIN CALORITRONICS XII. 2023
  19. MODAK, Rajkumar, HIRAI, Takamasa, SAKURABA, Yuya, MITANI, Seiji, OYANAGI Koichi, SEKI, Takeshi, UCHIDA, Kenichi. High-throughput screening of magnetoresistance materials based on lock-in thermography. SPIN CALORITRONICS XII. 2023
  20. IMAMURA, Takumi, 大柳 洸一, IGUCHI, Ryo, HIRAI, Takamasa, 髙森 健太, 小林 悟, UCHIDA, Kenichi. Magnetic-field-modulated lock-in thermography enabling quantitative estimation of the thermal Hall effect. SPIN CALORITRONICS Ⅻ. 2023
  21. Kenta Takamori, 大柳 洸一, Takumi Imamura, NAGASAWA, Ren, MAHALINGAM, Krishnan, HIRAI, Takamasa, Satoru Kobayashi, UCHIDA, Kenichi. Transverse magneto-thermoelectric conversion in sintered Co2MnGa slab. 第70回 応用物理学会 春季学術講演会. 2023
2021
  1. MODAK, Rajkumar, SAKURABA, Yuya, HIRAI, Takamasa, Yagi Takashi, SEPEHRI AMIN, Hossein, Masuda Hiroto, SEKI, Takeshi, Takanashi Koki, ZHOU, Weinan, OHKUBO, Tadakatsu, UCHIDA, Kenichi. Combinatorial investigation of Sm-Co-based amorphous alloy films for zero-field transverse thermoelectric generation. Symposium on Magnetism and Spintronics (SMS-2021). 2021
  2. Pukun Tan, 平井 孝昌, 井口 亮, Xianzhe Chen, Cheng Song, Dazhi Hou, 内田 健一. Phase boundary resolving by lock-in thermography. Kavli ITS 2021 Workshop on Multidisciplinary Spintronics. 2021
  3. 平井 孝昌, セペリ アミン 那仁, 長谷川 顕登, 小山 知弘, 井口 亮, 大久保 忠勝, 千葉 大地, 内田 健一. Mechanical cooling-heating switching of anisotropic magneto-Peltier effect. 2021年第82回応用物理学会 秋季学術講演会 (https://meeting.jsap.or.jp/). 2021
  4. 平井 孝昌, セペリ アミン 那仁, 長谷川 顕登, 小山 知弘, 井口 亮, 大久保 忠勝, 千葉 大地, 内田 健一. Mechanical cooling-heating switching of anisotropic magneto-Peltier effect. 2021年第82回応用物理学会 秋季学術講演会. 2021 招待講演
  5. 平井 孝昌, セペリ アミン ホセイン, 長谷川 顕登, 小山 知弘, 井口 亮, 大久保 忠勝, 千葉 大地, 内田 健一. Strain-induced switching of cooling-heating generated by anisotropic magneto-Peltier effect. 2021年第68回応用物理学会 春季学術講演会. 2021

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