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Nonequilibrium collective dynamics of magnetic skyrmion

Research Project

Project/Area Number 20K14419
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
Research InstitutionNational Institute for Materials Science

Principal Investigator

SUGIMOTO Satoshi  国立研究開発法人物質・材料研究機構, 磁性・スピントロニクス材料研究センター, 主任研究員 (90812610)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords磁気スカーミオン / 薄膜 / 磁性 / 非線形応答 / 遷移金属化合物 / トポロジカル絶縁体 / スピントロニクス / 薄膜作製技術 / 機械学習 / 希土類間化合物 / 希土類金属間化合物 / 磁気イメージング / ホイスラー合金 / トポロジカル効果 / 表面・界面 / 金属 / 統計物理学
Outline of Research at the Start

磁気スカーミオンは、トポロジカル効果により、小型化・低エネルギー操作が可能となる新奇的な磁化パターンである。
本研究では、強いスカーミオン同士の相互作用を示す超薄膜ヘテロ構造を用いることで、従来の線形応答に加え、新たに非線形過程に発現する物性に着目する。非線形応答に現れる集団的スカーミオン秩序や増殖過程の微視的起源を明らかにし、新たにスカーミオン粒子を用いた統計モデルの構築を目指す。

Outline of Final Research Achievements

The nonlinear dynamics of magnetic skyrmions, particle-type magnetic domains with finite topological number, have been systematically investigated for ultrathin heavy metal and ferromagnetic heterostructures. Such nonlinear response shows unique group velocity organized by thermal potential model, and additional multiplication process is newly developed in this research. By integrating these three properties as (i) multi-dimensionality, (ii) memory effect, (iii)nonlinear response, the physical reservoir of magnetic skyrmions is developed for the first time. Successful wave recognition is implemented using such skyrmion reservoir, indicating protected topological properties are suit for Non‐Von Neumann computing.
As the second project, material research for skyrmionics materials has been implemented for thin-film inverse Heusler compounds, aiming at room temperature stabilization of skyrmion crystals for sputtered thin films.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は、L2クラスメモリとして注目を集める不揮発性メモリの研究開発に直結する。磁気スカーミオンは小型、かつトポロジカル効果による低電流駆動が可能な磁区構造として、その採用は、不揮発性メモリの障壁であった書き込み電流の大幅な低下を実現する可能性を秘めている。また、本研究で確認された非線形応答は、そのまま物理リザーバーの構築に適用できることが検証され、古典的なメモリデバイスの枠を超えた新規デバイス構築の実現性も示唆される結果となった。また、研究の一環で観察された異方性トルクは、電流操作磁化反転においても極めて新規的な性質を示している。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (17 results)

All 2024 2023 2022 2021 2020

All Journal Article (10 results) (of which Peer Reviewed: 9 results,  Open Access: 6 results) Presentation (6 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] Observation of charge-to-spin conversion with giant efficiency at Ni0.8Fe0.2/Bi2WO6 interface2023

    • Author(s)
      Das Saikat、Sugimoto Satoshi、Kushwaha Varun Kumar、Kozuka Yusuke、Kasai Shinya
    • Journal Title

      APL Materials

      Volume: 11 Issue: 4 Pages: 041113-041113

    • DOI

      10.1063/5.0142695

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
  • [Journal Article] Near-room temperature topological Hall effect at spin reorientations in sputtered NdCo5-xCux thin film2022

    • Author(s)
      Sugimoto Satoshi、Takahashi Yukiko K.、Kasai Shinya
    • Journal Title

      Applied Physics Letters

      Volume: 121 Issue: 18 Pages: 182404-182404

    • DOI

      10.1063/5.0128572

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Pattern recognition with neuromorphic computing using magnetic field-induced dynamics of skyrmions2022

    • Author(s)
      Yokouchi Tomoyuki、Sugimoto Satoshi、Rana Bivas、Seki Shinichiro、Ogawa Naoki、Shiomi Yuki、Kasai Shinya、Otani Yoshichika
    • Journal Title

      Science Advances

      Volume: 8 Issue: 39 Pages: 1-7

    • DOI

      10.1126/sciadv.abq5652

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transition of topological Hall effect for tetragonal Heusler Mn2PtSn thin film2021

    • Author(s)
      Sugimoto Satoshi、Takahashi Yukiko、Kasai Shinya
    • Journal Title

      Applied Physics Express

      Volume: 14 Issue: 10 Pages: 103003-103003

    • DOI

      10.35848/1882-0786/ac223f

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Negative correlation between the linear and the nonlinear conductance in magnetic tunnel junctions2021

    • Author(s)
      Shuichi Iwakiri, Satoshi Sugimoto, Yasuhiro Niimi, Yusuke Kozuka, Yukiko K. Takahashi, Shinya Kasai, and Kensuke Kobayashi
    • Journal Title

      Physical Review B

      Volume: 103 Issue: 24

    • DOI

      10.1103/physrevb.103.245427

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Electrical nucleation, displacement, and detection of antiferromagnetic domain walls in the chiral antiferromagnet Mn3Sn2020

    • Author(s)
      Sugimoto Satoshi、Nakatani Yoshinobu、Yamane Yuta、Ikhlas Muhammad、Kondou Kouta、Kimata Motoi、Tomita Takahiro、Nakatsuji Satoru、Otani Yoshichika
    • Journal Title

      Communications Physics

      Volume: 3 Issue: 1 Pages: 111-111

    • DOI

      10.1038/s42005-020-0381-8

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Interlayer exchange coupling modulated all-optical magnetic switching in synthetic ferrimagnetic heterostructures2020

    • Author(s)
      Wang Jian、Sugimoto Satoshi、Kasai Shinya、Takahashi Yukiko K
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 53 Issue: 47 Pages: 475002-475002

    • DOI

      10.1088/1361-6463/ababd0

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Spin injection efficiency through the pumping in epitaxial Co2MnSi/Pt thin film2020

    • Author(s)
      Sasaki Y.、Sugimoto S.、Takahashi Y. K.、Kasai S.
    • Journal Title

      AIP Advances

      Volume: 10 Issue: 8 Pages: 085311-085311

    • DOI

      10.1063/5.0008393

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generation of multipeak spectrum of spin torque oscillator in non-linear regime2020

    • Author(s)
      Iwakiri Shuichi、Sugimoto Satoshi、Niimi Yasuhiro、Kobayashi Kensuke、Kozuka Yusuke、Takahashi Yukiko K.、Kasai Shinya
    • Journal Title

      Applied Physics Letters

      Volume: 117 Issue: 2 Pages: 022406-022406

    • DOI

      10.1063/5.0013102

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multiple modes of a single spin torque oscillator under the non-linear region2020

    • Author(s)
      Sugimoto Satoshi、Iwakiri Shuichi、Kozuka Yusuke、Takahashi Yukiko、Niimi Yasuhiro、Kobayashi Kensuke、Kasai Shinya
    • Journal Title

      AIP Advances

      Volume: 10 Issue: 7 Pages: 075115-075115

    • DOI

      10.1063/5.0013105

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Biカルコゲナイド薄膜における異方性スピン軌道トルクの生成2024

    • Author(s)
      杉本聡志、荒木康史、高橋有紀子、家田淳一、葛西伸哉
    • Organizer
      日本物理学会2024年春季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Transition of Topological Hall signal for Mn-based inverse Heusler thin films2022

    • Author(s)
      杉本 聡志、葛西 伸哉、高橋 有紀子
    • Organizer
      24th International Colloquium on Magnetic Films and Surfaces
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 薄膜形成技術に向けた磁気光学顕微鏡2022

    • Author(s)
      杉本 聡志、佐々木 悠太、葛西 伸哉、高橋 有紀子
    • Organizer
      日本磁気学会 第236回研究会/第69回化合物新磁性専門研究会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Mn系規則合金薄膜における 巨大なトポロジカルホール効果の検出2021

    • Author(s)
      杉本 聡志, 葛西 伸哉, 高橋 有紀子
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Mn 系規則合金薄膜の輸送特性と磁気異方性の発現2021

    • Author(s)
      杉本 聡志, 高橋 有紀子
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 非線形領域でのマルチモード生成2020

    • Author(s)
      杉本 聡志, 葛西 伸哉, 高橋 有紀子
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Research-status Report
  • [Book] 次世代EV/HEV用モータの高出力化と関連材料の開発2022

    • Author(s)
      加藤 克司、牧野 秀樹、小森 雅晴、他57名
    • Total Pages
      673
    • Publisher
      技術情報協会
    • ISBN
      9784861048692
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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