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平井 孝昌

平井 孝昌 (HIRAI, Takamasa) 0000-0002-5577-8018

Address
305-0047 茨城県つくば市千現1-2-1 [アクセス]

[論文] | [書籍] | [会議録] | [口頭発表] | [その他の文献] | [公開特許出願]

論文 TSV

2024
  1. 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
  2. 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
  3. 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
  4. 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
2023
  1. Rajkumar Modak, Takamasa Hirai, Seiji Mitani, Ken-ichi Uchida. Observation of the Anisotropic Magneto-Thomson Effect. Physical Review Letters. 131 [20] (2023) 206701 10.1103/physrevlett.131.206701
  2. Takamasa Hirai, Koichiro Uto, Mitsuhiro Ebara, Ken-ichi Uchida. Elastocaloric effect of shape memory polymers in elastic response regime. Journal of Physics: Energy. 5 [3] (2023) 034011 10.1088/2515-7655/ace7f3 Open Access
  3. Weinan Zhou, Asuka Miura, Takamasa Hirai, Yuya Sakuraba, Ken-ichi Uchida. Seebeck-driven transverse thermoelectric generation in magnetic hybrid bulk materials. Applied Physics Letters. 122 [6] (2023) 062402 10.1063/5.0126870
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. 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
  2. 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
  3. 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
  4. 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. 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
  4. 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
  5. 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
  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. 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
  12. 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
  13. IMAMURA, Takumi, OYANAGI, Koichi, 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
  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 Kumar, 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. IMAMURA, Takumi, OYANAGI, Koichi, 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
  18. 高森健太, OYANAGI, Koichi, 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
  19. 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
  20. 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
  21. Kenta Takamori, OYANAGI, Koichi, 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
2022
  1. 高萩 敦, 平井 孝昌, 井口 亮, 中川原 圭太, 長野 方星, 内田 健一. ロックインサーモグラフィ法によるスピンペルチェ効果の温度及び磁性体膜厚依存性の測定. 第43回日本熱物性シンポジウム. 2022
  2. NAGASAWA, Ren, 大柳 洸一, HIRAI, Takamasa, MODAK, Rajkumar, 小林 悟, UCHIDA, Kenichi. Anomalous Ettingshausen effect in Fe-C alloys. 2022年 第83回 応用物理学会 秋季学術講演会. 2022
  3. MODAK, Rajkumar, SAKURABA, Yuya, HIRAI, Takamasa, Yagi Takashi, SEPEHRI AMIN, Hossein, ZHOU, Weinan, Masuda Hiroto, SEKI, Takeshi, Takanashi Koki, OHKUBO, Tadakatsu, UCHIDA, Kenichi. SM-CO-BASED AMORPHOUS ALLOY FILMS FOR ZERO-FIELD TRANSVERSE THERMOELECTRIC GENERATION. 24th International Colloquium on Magnetic Films and Surfaces (ICMFS-2022). 2022
  4. MODAK, Rajkumar, SAKURABA, Yuya, HIRAI, Takamasa, Takashi Yagi, SEPEHRI AMIN, Hossein, Hiroto Masuda, SEKI, Takeshi, Koki Takanashi, ZHOU, Weinan, OHKUBO, Tadakatsu, UCHIDA, Kenichi. Sm-Co-based amorphous alloy films for zero-field transverse thermoelectric generation. 2022年 第69回応用物理学会春季学術講演会. 2022
  5. MIZUNO, Hayato, MODAK, Rajkumar, HIRAI, Takamasa, 高萩敦, SAKURABA, Yuya, IGUCHI, Ryo, UCHIDA, Kenichi. Annealing temperature dependence of thermo-spin and magneto-thermoelectric conversion in Co2MnGa films on Y3Fe5O12 and Gd3Ga5O12. 2022年第69回応用物理学会春季学術講演会. 2022
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

その他の文献 TSV

公開特許出願 TSV

  1. 弾性熱量効果を用いた温度変調部材、弾性熱量効果の測定用試験片、及び弾性熱量効果の測定方法 (2022)

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