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最終更新日：2026年4月17日

Last updated: 17/04/2026

 

酸化物

Oxide materials

1. H. Koizumi, Y. Yuichi and A. Hirohata,
   "d-wave altermagnetism in epitaxial NiCo₂O₄ thin films via eassy-cone magnetic anisotropy,"
   1st Symposium on JST Aspire project “Research network on spintronic materials and devices for the sustainable society (SpinMaD)” (27/11/2025, Dresden, Germany).

磁気スキルミオン

Magnetic Skyrmions

1. H. Koizumi, R. Ishikawa, W. Zeng, H. Ma, S. Miki, S. Mizukami, Y. Suzuki and A. Hirohata,
   "Skyrmion motion under the interfacial improvement by a pulsed current,"
   70th Annual Conference on Magnetism and Magnetic Materials (MMM 2025) (28/10/2025, Palm Beach, FL, USA).
2. H. Koizumi, R. Ishikawa, W. Zeng, H. Ma, S. Miki, S. Mizukami, Y. Suzuki and A. Hirohata,
   "Observation of the motion of magnetic skyrmions with the interfacial improvement by a pulsed current,"
   Joint European Magnetic Symposia (JEMS) 2025 (26/08/2025, Frankfurt, Germany).
3. 小泉 洸生、石川 諒、鈴木 義茂、廣畑 貴文,
   "パルス電流による界面制御と磁気スキルミオン駆動観察,"
   第72回応用物理学会春季学術講演会 (2025年3月15日, 東京理科大学野田キャンパス). H. Koizumi, R. Ishikawa, Y. Suzuki and A. Hirohata,
   "Observation of the motion of magnetic skyrmions with the interfacial improvement by a pulsed current,"
   72nd Japan Society of Applied Physics (JSAP) Spring Meeting (15/03/2025, Noda, Japan).

表面プラズモン

Surface Plasmon Polaritons

1. A. Y. Lee, H. Koizumi, M. Yaqoob, E. Mödl and A. Hirohata,
   "Surface plasmon polariton measurements on different substrates for spintronic applications,"
   Materials Science and Spintronics for Sustainable Futures from Tohoku (MSSp 2025) (05/11/2025, Sendai, Japan).
2. H. Koizumi, D. Lloyd, T. J. Wijaya, D. Oue, M. Matsuo and A. Hirohata,
   "Spin current generation by a surface plasmon polariton,"
   International Conference on Magnetism (ICM 2024) (02/07/2024, Bologna, Italy).

ニューロモーフィック コンピューティング

Potentiation

1. T. J. Dale, L. Soumah, R. Sousa, P. Talatchian, I.-L. Prejbeanu, W. Frost and A. Hirohata,
   "Interfacial improvement by introducing a pulsed current in a magnetic tunnel junction,"
   Magnetics and Optics Research International Symposium (MORIS 2024) (29/05/2024, York, UK).
2. T. J. Dale, L. Soumah, R. Sousa, P. Talatchian, I.-L. Prejbeanu, W. Frost and A. Hirohata,
   "Interfacial improvement by introducing a pulsed current in a magnetic tunnel junction,"
   68th Annual Conference on Magnetism and Magnetic Materials (MMM 2023) (03/11/2023, Dallas, TX, USA).

ホイスラー合金

Heusler alloys

1. H. Koizumi, K. B. Fathoni, Y. Yamamoto, Z. Wen, H. Sukegawa, S. Mitani and A. Hirohata,
   "Voltage effect of CoFeB/MgO/CoFeB tunnel junction using a decelerated scanning electron beam,"
   International Magnetics Conference (Intermag 2026)” (17/04/2026, Manchester, UK).
2. E. Pandey, S. Yamashita, E. Lesne, G. Fecher, C. Felser and A. Hirohata,
   "Broadly Tunable Compensation in Ferrimagnetic MnFeVAl Heusler Alloy Thin Film,"
   International Magnetics Conference (Intermag 2026)” (16/04/2026, Manchester, UK).
3. S. Yamashita, E. Pandey, G. Fecher, C. Felser and A. Hirohata,
   "Ab initio Study of Magnetic and Transport Properties of Fully Compensated Ferrimagnetic Heusler Alloys at Finite Temperatures,"
   International Magnetics Conference (Intermag 2026)” (16/04/2026, Manchester, UK).
4. パンディー エシタ、山下 祥吾、レスネ エドアード、フェッチャー ゲルハルト、フェルザー クラウディア、廣畑 貴文,
   "フェリ磁性ホイスラー合金における補償温度制御,"
   第49回日本磁気学会学術講演会 (2025年9月16日, 松山). E. Pandey, S. Yamashita, E. Lesne, G. Fecher, C. Felser and A. Hirohata,
   "Control of a compensation temperature in a ferrimagnetic Heusler alloy,"
   49th Annual Conference on Magnetics in Japan (16/09/2025, Matsuyama, Japan).
5. C. H. Leung, Y. H. Ling, H. Koizumi, E. Lesne, C. Felser and A. Hirohata,
   "Correlations between defect density and magnetic properties of Heusler alloy films,"
   International Conference of Asian Union of Magnetics Societies (IcAUMS)) (23/04/2025, Okinawa, Japan).
6. C. H. Leung, Y. H. Ling, H. Koizumi, E. Lesne, C. Felser and A. Hirohata,
   "Correlations between defect density and magnetic properties of Heusler alloy films,"
   Joint Magnetism and Magnetic Materials (MMM)-International Conference on Magnetics (Intermag) (14/01/2025, New Orleans, LO, USA).
7. T. Sarfo, W. Li and A. Hirohata,
   "Spin-gapless semiconducting Heusler-alloy films,"
   68th Annual Conference on Magnetism and Magnetic Materials (MMM 2023) (03/11/2023, Dallas, TX, USA).

埋め込まれた界面の構造観察

Buried Interface Imaging

1. A. Hirohata, H. Koizumi, K. B. Fathoni, Y. Yamamoto, Z. Wen, H. Sukegawa and S. Mitani,
   "Non-destructive imaging on magnetic tunnel junctions for quality assurance,"
   20th Magnetics and Optics Research International Symposium (MORIS 2026) (28/05/2026, Nagasaki, Japan).
2. A. Hirohata, K. Elphick, D. C. Lloyd and S. Mizukami,
   "Interfacial imaging on magnetic junctions by electron microscopy,"
   47th Annual Conference on Magnetics in Japan (28/09/2023, Osaka, Japan).