Ferrimagnetic spintronics and device application

• Project/Area Number: 20H05665
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Review Section: Broad Section D
• Research Institution: Kyoto University
• Principal Investigator: 小野 輝男 京都大学, 化学研究所, 教授 (90296749)
• Project Period (FY): 2020-08-31 – 2025-03-31
• Project Status: Declined (Fiscal Year 2024)
• Budget Amount: ¥199,160,000 (Direct Cost: ¥153,200,000、Indirect Cost: ¥45,960,000); Fiscal Year 2024: ¥32,890,000 (Direct Cost: ¥25,300,000、Indirect Cost: ¥7,590,000); Fiscal Year 2023: ¥32,890,000 (Direct Cost: ¥25,300,000、Indirect Cost: ¥7,590,000); Fiscal Year 2022: ¥32,890,000 (Direct Cost: ¥25,300,000、Indirect Cost: ¥7,590,000); Fiscal Year 2021: ¥32,890,000 (Direct Cost: ¥25,300,000、Indirect Cost: ¥7,590,000); Fiscal Year 2020: ¥67,600,000 (Direct Cost: ¥52,000,000、Indirect Cost: ¥15,600,000)
• Keywords: スピントロニクス / フェリ磁性体

Outline of Research at the Start

フェリ磁性体は、２種類の磁気モーメントが反平行に結合しながらも正味の磁化を有する物質である。研究代表者らは、フェリ磁性GdFeCo合金が「磁化を持つ反強磁性体として振る舞う」ことを最近見いだした。本研究では、フェリ磁性体の「磁化を持つ反強磁性体」としての振る舞いの普遍性と多様性を明らかにし、「フェリ磁性スピントロニクス」という新しい学理を構築し、デバイス応用へ展開する。

Outline of Annual Research Achievements

フェリ磁性体は、２種類の磁気モーメントが反強磁性的に結合しながらも正味の磁化を有する物質である。磁化の大きさは組成や温度で調整可能で、２種類の磁気モーメントが完全に打ち消し合い反強磁性体のように磁化がゼロとなる状況も実現可能である。
研究代表者らは、フェリ磁性GdFeCo合金が「磁化を持つ反強磁性体として振る舞う」ことを最近見いだした。本研究では、フェリ磁性体の「磁化を持つ反強磁性体」としての振る舞いの普遍性と多様性を明らかにすることで、「フェリ磁性スピントロニクス」という新しい学理を構築し、デバイス応用へ展開することを目的とする。
本研究課題の核心をなす学術的「問い」は、フェリ磁性体の新しい側面「磁化を持つ反強磁性体としての振る舞い」は「普遍的なものか？」、そして「革新的デバイス応用へつながるか？」である。この学術的「問い」に答えるために、本研究では、(1)フェリ磁性体の磁化を持つ反強磁性体としての振る舞いの普遍性と多様性を明らかにするとともに、(2)その特徴を活かしたデバイス応用への展開を図ることで、フェリ磁性スピントロニクスの基盤を構築する。
本年度は、幅を空間的に変調した細線状デバイスに流した電流によるジュール加熱によって空間的な温度分布を作り出すことで、磁気補償によって磁化がゼロとなるナノスケールの領域を作り出すことができることを示し論文発表した。また、人工反強磁性体中のマグノンマグノン結合の定量測定を行い論文発表した。

Research Progress Status

翌年度、交付申請を辞退するため、記入しない。

Strategy for Future Research Activity

翌年度、交付申請を辞退するため、記入しない。

Assessment Rating

Interim Assessment Comments (Rating)

A: In light of the aim of introducing the research area into the research categories, the expected progress has been made in research.

Research Products

• [Journal Article] Giant Asymmetry of Domain Walls Propagation in Pd/Co/Pd(111) Epitaxial Structures with Different Interface Roughness (2024)
  • Author(s): Davydenko Aleksandr V.、Kozlov Aleksei G.、Chernousov Nikolay N.、Turpak Aleksandr A.、Ermakov Konstantin S.、Stebliy Maksim E.、Letushev Michail E.、Sadovnikov Alexandr V.、Golikov Aleksey P.、Ognev Alexey V.、Shiota Yoichi、Ono Teruo、Samardak Alexander S.
  • Journal Title: ACS Applied Electronic Materials Volume: 6 Issue: 2 Pages: 1094-1103
  • DOI: 10.1021/acsaelm.3c01480
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Rectification Effect of Non-Centrosymmetric Nb/V/Ta Superconductor (2023)
  • Author(s): Kawarazaki R.、Iijima R.、Narita H.、Hisatomi R.、Shiota Y.、Moriyama T.、Ono T.
  • Journal Title: Journal of the Magnetics Society of Japan Volume: 47 Issue: 5 Pages: 133-136
  • DOI: 10.3379/msjmag.2309R001
  • ISSN: 1882-2924, 1882-2932
  • Year and Date: 2023-09-01
  • Peer Reviewed / Open Access
• [Journal Article] Observation of mode splitting by magnon-magnon coupling in synthetic antiferromagnets (2023)
  • Author(s): Hayashi Daiju、Shiota Yoichi、Ishibashi Mio、Hisatomi Ryusuke、Moriyama Takahiro、Ono Teruo
  • Journal Title: Applied Physics Express Volume: 16 Issue: 5 Pages: 053004-053004
  • DOI: 10.35848/1882-0786/acd5a6
  • Peer Reviewed
• [Journal Article] Nonuniform Current-Driven Formation and Displacement of the Magnetic Compensation Point in Variable-Width Nanoscale Ferrimagnets (2023)
  • Author(s): Stebliy Maksim E.、Bazrov Michail A.、Namsaraev Zhimba Zh.、Letushev Michail E.、Kozlov Aleksei G.、Antonov Valerii A.、Stebliy Ekaterina V.、Davydenko Aleksandr V.、Ognev Alexey V.、Shiota Yoichi、Ono Teruo、Samardak Alexander S.
  • Journal Title: ACS Applied Materials & Interfaces Volume: 15 Issue: 34 Pages: 40792-40798
  • DOI: 10.1021/acsami.3c08979
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Pulse-width dependence of spin?orbit torque switching in Mn₃Sn/Pt thin films (2023)
  • Author(s): Kobayashi Yuta、Shiota Yoichi、Narita Hideki、Ono Teruo、Moriyama Takahiro
  • Journal Title: Applied Physics Letters Volume: 122 Issue: 12 Pages: 122405-122405
  • DOI: 10.1063/5.0144602
  • Peer Reviewed
• [Journal Article] Magnetization Control of Zero‐Field Intrinsic Superconducting Diode Effect (2023)
  • Author(s): Narita Hideki、Ishizuka Jun、Kan Daisuke、Shimakawa Yuichi、Yanase Youichi、Ono Teruo
  • Journal Title: Advanced Materials Volume: 35 Issue: 40 Pages: 2304083-2304083
  • DOI: 10.1002/adma.202304083
  • Peer Reviewed
• [Journal Article] Electrical Detection of Antiferromagnetic Dynamics in Gd-Co Thin Films Using 154-GHz Gyrotron Irradiation (2023)
  • Author(s): Funada S.、Ishikawa Y.、Kimata M.、Hayashi K.、Sano T.、Sugi K.、Fujii Y.、Mitsudo S.、Shiota Y.、Ono T.、Moriyama T.
  • Journal Title: Physical Review Applied Volume: 19 Issue: 3
  • DOI: 10.1103/physrevapplied.19.l031003
  • Peer Reviewed
• [Journal Article] Field-free superconducting diode effect in noncentrosymmetric superconductor/ferromagnet multilayers (2022)
  • Author(s): Narita Hideki、Ishizuka Jun、Kawarazaki Ryo、Kan Daisuke、Shiota Yoichi、Moriyama Takahiro、Shimakawa Yuichi、Ognev Alexey V.、Samardak Alexander S.、Yanase Youichi、Ono Teruo
  • Journal Title: Nature Nanotechnology Volume: 17 Issue: 8 Pages: 823-828
  • DOI: 10.1038/s41565-022-01159-4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Polarization-Selective Excitation of Antiferromagnetic Resonance in Perpendicularly Magnetized Synthetic Antiferromagnets (2022)
  • Author(s): Shiota Yoichi、Arakawa Tomonori、Hisatomi Ryusuke、Moriyama Takahiro、Ono Teruo
  • Journal Title: Physical Review Applied Volume: 18 Issue: 1 Pages: 014032-014032
  • DOI: 10.1103/physrevapplied.18.014032
  • Peer Reviewed
• [Journal Article] Extrinsic contribution to anomalous Hall effect in chiral antiferromagnetic (111)-oriented L12-Mn3Ir films (2022)
  • Author(s): Y. Kobayashi, M. Kimata, D. Kan, T. Ikebuchi, Y. Shiota, H. Kohno, Y. Shimakawa, T. Ono, and T. Moriyama
  • Journal Title: Jpn. J. Appl. Phys. Volume: 61 Issue: 7 Pages: 0709121-4
  • DOI: 10.35848/1347-4065/ac7625
  • Peer Reviewed
• [Journal Article] Low ferrimagnetic damping in Gd3Fe5O12 epitaxial films grown using pulsed laser deposition (2022)
  • Author(s): Funada S.、Kan D.、Kuwano K.、Shiota Y.、Hisatomi R.、Moriyama T.、Shimakawa Y.、Ono T.
  • Journal Title: Applied Physics Letters Volume: 121 Issue: 9 Pages: 092402-092402
  • DOI: 10.1063/5.0099618
  • Peer Reviewed
• [Journal Article] Magnetic-field-induced polarity oscillation of superconducting diode effect (2022)
  • Author(s): Kawarazaki Ryo、Narita Hideki、Miyasaka Yuta、Ikeda Yuhei、Hisatomi Ryusuke、Daido Akito、Shiota Yoichi、Moriyama Takahiro、Yanase Youichi、Ognev Alexey V.、Samardak Alexander S.、Ono Teruo
  • Journal Title: Applied Physics Express Volume: 15 Issue: 11 Pages: 113001-113001
  • DOI: 10.35848/1882-0786/ac99b9
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Magnetic polarization selective spectroscopy of magnetic thin films probed by wideband crossed microstrip circuit in GHz regime (2022)
  • Author(s): Arakawa Tomonori、Shiota Yoichi、Yamada Keisuke、Ono Teruo、Kon Seitaro
  • Journal Title: Review of Scientific Instruments Volume: 93 Issue: 1 Pages: 013901-013901
  • DOI: 10.1063/5.0074654
  • Peer Reviewed
• [Journal Article] Crystal orientation dependence of spin Hall angle in epitaxial Pt/FeNi systems (2022)
  • Author(s): Ikebuchi Tetsuya、Shiota Yoichi、Ono Teruo、Nakamura Kohji、Moriyama Takahiro
  • Journal Title: Applied Physics Letters Volume: 120 Issue: 7 Pages: 072406-072406
  • DOI: 10.1063/5.0078688
  • Peer Reviewed
• [Journal Article] Inhomogeneous magnetic properties characterized by simultaneous electrical and optical detection of spin-torque ferromagnetic resonance (2021)
  • Author(s): Shiota Yoichi、Hisatomi Ryusuke、Moriyama Takahiro、Samardak Alexander S.、Ono Teruo
  • Journal Title: Applied Physics Letters Volume: 119 Issue: 19 Pages: 192409-192409
  • DOI: 10.1063/5.0070012
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Observation of nonreciprocal superconducting critical field (2021)
  • Author(s): Miyasaka Yuta、Kawarazaki Ryo、Narita Hideki、Ando Fuyuki、Ikeda Yuhei、Hisatomi Ryusuke、Daido Akito、Shiota Yoichi、Moriyama Takahiro、Yanase Youichi、Ono Teruo
  • Journal Title: Applied Physics Express Volume: 14 Issue: 7 Pages: 073003-073003
  • DOI: 10.35848/1882-0786/ac03c0
  • Peer Reviewed
• [Journal Article] Long-distance spin current transmission in single-crystalline NiO thin films (2021)
  • Author(s): Ikebuchi Tetsuya、Kobayashi Yuta、Sugiura Itaru、Shiota Yoichi、Ono Teruo、Moriyama Takahiro
  • Journal Title: Applied Physics Express Volume: 14 Issue: 12 Pages: 123001-123001
  • DOI: 10.35848/1882-0786/ac3575
  • Peer Reviewed
• [Journal Article] Field-driven domain wall creep motion in ferrimagnetic Tb/CoFeB/MgO microwires (2021)
  • Author(s): Hirata Yuushou、Noda Kaoru、Shiota Yoichi、Moriyama Takahiro、Ono Teruo
  • Journal Title: Japanese Journal of Applied Physics Volume: 60 Issue: 2 Pages: 020902-020902
  • DOI: 10.35848/1347-4065/abd67d
  • Peer Reviewed
• [Presentation] Field-free superconducting diode effect in noncentrosymmetric superconductor/ferromagnet multilayers (2023)
  • Author(s): Teruo Ono
  • Organizer: INTERMAG2023
  • Int'l Joint Research / Invited
• [Presentation] Superconducting diode effect in Rashba superlattice (2023)
  • Author(s): Teruo Ono
  • Organizer: 7th Sol-SkyMag International Conference
  • Int'l Joint Research / Invited
• [Presentation] X-Spintronics (2023)
  • Author(s): Teruo Ono
  • Organizer: The 13th International Conference on Advanced Materials and Devices
  • Int'l Joint Research / Invited
• [Presentation] Superconducting diode effect (2023)
  • Author(s): Teruo Ono
  • Organizer: 2024 Annual Meeting of the Physical Society of Taiwan
  • Invited
• [Presentation] Superconducting diode effect in Rashba superlattice (2023)
  • Author(s): Teruo Ono
  • Organizer: 1st KAI-X Global Conference in Physics-International workshop on Orbitronics
  • Int'l Joint Research / Invited
• [Presentation] Superconducting diode effect in Rashba superlattice (2023)
  • Author(s): Teruo Ono
  • Organizer: International Workshop of Spin/Quantum Materials and Devices
  • Int'l Joint Research / Invited
• [Presentation] Superconducting diode effect in Rashba superlattice (2023)
  • Author(s): Teruo Ono
  • Organizer: DPG Spring Meetings
  • Invited
• [Presentation] 3D domain wall motion memory with artificial ferromagnet (2022)
  • Author(s): Teruo Ono
  • Organizer: International Conference on Microwave Magnetics 2022
  • Int'l Joint Research / Invited
• [Presentation] Dynamics of Domain Wall and Skyrmion in Ferrimagnet (2022)
  • Author(s): Teruo Ono
  • Organizer: Sol-SkyMag International Conference
  • Int'l Joint Research / Invited
• [Presentation] 3D domain wall motion memory with artificial ferromagnet (2022)
  • Author(s): Teruo Ono
  • Organizer: Joint European Magnetic Symposia 2022
  • Int'l Joint Research / Invited
• [Presentation] 3D domain wall motion memory with artificial ferromagnet (2022)
  • Author(s): Teruo Ono
  • Organizer: 7th Workshop on Magnonics 2022
  • Int'l Joint Research / Invited
• [Presentation] Superconducting Diode Effect in Rashba Superlattice (2022)
  • Author(s): Teruo Ono
  • Organizer: 29th International Conference on Low Temperature Physics
  • Int'l Joint Research / Invited
• [Presentation] Ferrimagnetic spintronics (2022)
  • Author(s): Teruo Ono
  • Organizer: MAGNEFI conference 2022
  • Int'l Joint Research / Invited
• [Presentation] Superconducting diode effect in Rashba superlattice (2022)
  • Author(s): Teruo Ono
  • Organizer: The 6th Symposium for the Core Research Clusters for Materials Science and Spintronics
  • Int'l Joint Research / Invited
• [Presentation] 3D domain wall motion memory with artificial ferromagnet (2022)
  • Author(s): Teruo Ono
  • Organizer: International Workshop on Spintronics 2022
  • Int'l Joint Research / Invited
• [Presentation] Superconducting Diode Effect in Rashba Superlattice (2022)
  • Author(s): Teruo Ono
  • Organizer: Oxide Superconducting Spintronics Workshop 2022
  • Int'l Joint Research / Invited
• [Presentation] Superconducting Diode Effect in Rashba Superlattice (2022)
  • Author(s): Teruo Ono
  • Organizer: 6th International Symposium on Frontiers in Materials Science
  • Int'l Joint Research / Invited
• [Presentation] Superconducting Diode Effect in Rashba Superlattice (2022)
  • Author(s): Teruo Ono
  • Organizer: 35th International Symposium on Superconductivity (ISS2022)
  • Int'l Joint Research / Invited
• [Presentation] Dynamics of Domain Wall and Skyrmion in Ferrimagnet (2021)
  • Author(s): 小野輝男
  • Organizer: The 5th International Conference on "Nanomagnetism and Spintronics" (Sol-SkyMag 2021)
  • Int'l Joint Research / Invited
• [Presentation] Dynamics of Domain Wall and Skyrmion in Ferrimagnet (2021)
  • Author(s): 小野輝男
  • Organizer: Workshop on Magnetism, Interactions and Complexity
  • Int'l Joint Research / Invited
• [Presentation] フェリ磁性体の磁化ダイナミクス (2021)
  • Author(s): 小野輝男
  • Organizer: 日本物理学会 2021年秋季大会
  • Invited
• [Presentation] フェリ磁性ガーネットGd3Fe5O12薄膜における磁気共鳴 (2021)
  • Author(s): 船田晋作
  • Organizer: 粉体粉末冶金協会2021年度春季大会（第127回講演大会）
• [Presentation] フェリ磁性体Co/Gd多層膜における磁気共鳴測定 (2021)
  • Author(s): 桑野恭輔
  • Organizer: 日本物理学会第77回年次大会
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