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Development of room-temperature magnetic materials with topological spin textures

Research Project

Project/Area Number 20K15164
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 29010:Applied physical properties-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Kosuke Karube  国立研究開発法人理化学研究所, 創発物性科学研究センター, 研究員 (00755431)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsスキルミオン / アンチスキルミオン / カイラル磁性体 / フラストレート磁性体 / S4対称性 / 新物質開拓 / 磁気異方性 / フラクタル磁区構造 / 磁気力顕微鏡 / 小角中性子散乱 / 単結晶合成 / 新物質探索
Outline of Research at the Start

本研究では、室温スキルミオン物質であるCo-Zn-Mn合金について、Co10Zn10からMn20までの様々な組成を合成し、磁化率測定、電気輸送測定、中性子散乱測定を行い、磁気物性の全体像を明らかにする。また、室温スキルミオンによる創発輸送現象を観測し、元素置換により、その効果の巨大化する。さらに、小さいサイズのスキルミオンや反スキルミオンを室温で示す可能性のある新物質を合成し、様々な測定により、磁気構造を明らかにする。

Outline of Final Research Achievements

In this study, we have investigated physical properties of room-temperature topological magnets and explored new materials. First, we found that the metastable skyrmion lattices of Co-Zn-Mn alloys are governed by magnetic anisotropy and magnetic disorder due to the frustrated Mn spins. Second, we discovered a new antiskyrmion-host magnet (Fe,Ni,Pd)3P with S4 symmetry, and revealed that the delicate balance between easy-axis magnetic anisotropy energy and demagnetization energy is essential for the stability of antiskyrmions. Furthermore, we found novel sawtooth and fractal magnetic domain structures near the surface of bulk single crystals of (Fe,Ni,Pd)3P.

Academic Significance and Societal Importance of the Research Achievements

本研究のCo-Zn-Mn合金の系統的な研究により、Mnのフラストレート磁性がスキルミオンを担うCoスピンに及ぼす磁気的な乱れがスキルミオンの準安定性や格子変形に重要であることが明らかとなり、Co-Zn-Mn系の複雑なスキルミオン状態の全貌が明かされた。また、本研究におけるS4対称性の室温アンチスキルミオン物質(Fe,Ni,Pd)3Pの発見は、これまでのD2d対称性のホイスラー合金のみにとどまっていたアンチスキルミオン研究のブレイクスルーとなり、アンチスキルミオンの複雑な安定化機構の解明にも繋がった。以上の成果は、室温(アンチ)スキルミオンを用いた磁気デバイスの実現に大きく貢献すると期待される。

Report

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

    (28 results)

All 2022 2021 2020 Other

All Int'l Joint Research (8 results) Journal Article (13 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 13 results,  Open Access: 9 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] Paul Scherrer Institute(スイス)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Institut Laue-Langevin(フランス)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] University of Augsburg/Karlsruhe Institute of Technology/Helmholz-Zentrum Berlin(ドイツ)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] University of Augsburg/Karlsruhe Institute of Technology(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Paul Scherrer Institut/EPFL(スイス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Institut Laue-Langevin(フランス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Paul Scherrer Institute/Ecole Polytechnique Federale de Lausanne(スイス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Institut Laue-Langevin(フランス)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Formation and Control of Zero‐Field Antiskyrmions in Confining Geometries2022

    • Author(s)
      Peng Licong、Iakoubovskii Konstantin V.、Karube Kosuke、Taguchi Yasujiro、Tokura Yoshinori、Yu Xiuzhen
    • Journal Title

      Advanced Science

      Volume: 9 Issue: 28 Pages: 2202950-2202950

    • DOI

      10.1002/advs.202202950

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Topological Melting of the Metastable Skyrmion Lattice in the Chiral Magnet Co9Zn9Mn22022

    • Author(s)
      Ukleev Victor、Morikawa Daisuke、Karube Kosuke、Kikkawa Akiko、Shibata Kiyou、Taguchi Yasujiro、Tokura Yoshinori、Arima Taka‐hisa、White Jonathan S.
    • Journal Title

      Advanced Quantum Technologies

      Volume: 5 Issue: 11 Pages: 2200066-2200066

    • DOI

      10.1002/qute.202200066

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Small-angle neutron scattering study of mesoscale magnetic disordering and skyrmion phase suppression in the frustrated chiral magnet Co6.75Zn6.75Mn6.52022

    • Author(s)
      White Jonathan S.、Karube Kosuke、Ukleev Victor、Derlet P. M.、Cubitt R.、Dewhurst C. D.、Wildes A. R.、Yu X. Z.、R?nnow H. M.、Tokura Yoshinori、Taguchi Yasujiro
    • Journal Title

      Journal of Applied Crystallography

      Volume: 55 Issue: 5 Pages: 1219-1231

    • DOI

      10.1107/s1600576722007403

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Unveiling the anisotropic fractal magnetic domain structure in bulk crystals of antiskyrmion host (Fe,Ni,Pd)3P by small-angle neutron scattering2022

    • Author(s)
      Karube Kosuke、Ukleev Victor、Kagawa Fumitaka、Tokura Yoshinori、Taguchi Yasujiro、White Jonathan S.
    • Journal Title

      Journal of Applied Crystallography

      Volume: 55 Issue: 6 Pages: 1392-1400

    • DOI

      10.1107/s1600576722008561

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Real-Space Observations of Three-Dimensional Antiskyrmions and Skyrmion Strings2022

    • Author(s)
      Yu Xiuzhen、Iakoubovskii Konstantin V.、Yasin Fehmi Sami、Peng Licong、Nakajima Kiyomi、Schneider Sebastian、Karube Kosuke、Arima Takahisa、Taguchi Yasujiro、Tokura Yoshinori
    • Journal Title

      Nano Letters

      Volume: 22 Issue: 23 Pages: 9358-9364

    • DOI

      10.1021/acs.nanolett.2c03142

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High-temperature non-centrosymmetric magnets for skyrmionics2022

    • Author(s)
      Karube Kosuke、Taguchi Yasujiro
    • Journal Title

      APL Materials

      Volume: 10 Issue: 8 Pages: 080902-080902

    • DOI

      10.1063/5.0097343

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Doping Control of Magnetic Anisotropy for Stable Antiskyrmion Formation in Schreibersite (Fe,Ni) 3P with S4 symmetry2022

    • Author(s)
      Karube Kosuke、Peng Licong、Masell Jan、Hemmida Mamoun、Krug von Nidda Hans‐Albrecht、Kezsmarki Istvan、Yu Xiuzhen、Tokura Yoshinori、Taguchi Yasujiro
    • Journal Title

      Advanced Materials

      Volume: 34 Issue: 11 Pages: 2108770-2108770

    • DOI

      10.1002/adma.202108770

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dynamic transition of current-driven single-skyrmion motion in a room-temperature chiral-lattice magnet2021

    • Author(s)
      Peng Licong、Karube Kosuke、Taguchi Yasujiro、Nagaosa Naoto、Tokura Yoshinori、Yu Xiuzhen
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 6797-6797

    • DOI

      10.1038/s41467-021-27073-2

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Vital role of magnetocrystalline anisotropy in cubic chiral skyrmion hosts2021

    • Author(s)
      Preissinger M.、Karube K.、Ehlers D.、Szigeti B.、Krug von Nidda H.-A.、White J. S.、Ukleev V.、Ronnow H. M.、Tokunaga Y.、Kikkawa A.、Tokura Y.、Taguchi Y.、Kezsmarki I.
    • Journal Title

      npj Quantum Materials

      Volume: 6 Issue: 1

    • DOI

      10.1038/s41535-021-00365-y

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Nano-to-micro spatiotemporal imaging of magnetic skyrmion’s life cycle2021

    • Author(s)
      T. Shimojima, A. Nakamura, X. Z. Yu, K. Karube, Y. Taguchi, Y. Tokura, K. Ishizaka
    • Journal Title

      Science Advances

      Volume: - Issue: 25 Pages: 1322-1322

    • DOI

      10.1126/sciadv.abg1322

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Room-temperature antiskyrmions and sawtooth surface textures in a non-centrosymmetric magnet with S4 symmetry2021

    • Author(s)
      Karube Kosuke、Peng Licong、Masell Jan、Yu Xiuzhen、Kagawa Fumitaka、Tokura Yoshinori、Taguchi Yasujiro
    • Journal Title

      Nature Materials

      Volume: 20 Issue: 3 Pages: 335-340

    • DOI

      10.1038/s41563-020-00898-w

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Frustration-driven magnetic fluctuations as the origin of the low-temperature skyrmion phase in Co7Zn7Mn62021

    • Author(s)
      Ukleev V.、Karube K.、Derlet P. M.、Wang C. N.、Luetkens H.、Morikawa D.、Kikkawa A.、Mangin-Thro L.、Wildes A. R.、Yamasaki Y.、Yokoyama Y.、Yu L.、Piamonteze C.、Jaouen N.、Tokunaga Y.、R?nnow H. M.、Arima T.、Tokura Y.、Taguchi Y.、White J. S.
    • Journal Title

      npj Quantum Materials

      Volume: 6 Issue: 1 Pages: 40-40

    • DOI

      10.1038/s41535-021-00342-5

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Metastable skyrmion lattices governed by magnetic disorder and anisotropy in β-Mn-type chiral magnets2020

    • Author(s)
      Karube K.、White J. S.、Ukleev V.、Dewhurst C. D.、Cubitt R.、Kikkawa A.、Tokunaga Y.、R?nnow H. M.、Tokura Y.、Taguchi Y.
    • Journal Title

      Physical Review B

      Volume: 102 Issue: 6 Pages: 064408-064408

    • DOI

      10.1103/physrevb.102.064408

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Antiskyrmion formation and tunable magnetic anisotropy in Pd-doped (Fe,Ni)3P with S4 symmetry2022

    • Author(s)
      K. Karube, L. C. Peng, J. Masell, M. Hemmida, H.-A. Krug von Nidda, I. Kezsmarki, F. Kagawa, X. Z. Yu, Y. Tokura, Y. Taguchi
    • Organizer
      29th International Conference on Low Temperature Physics (LT29)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] (Fe,Ni)3P系における組成変化による磁気異方性とアンチスキルミオンの安定性の制御2022

    • Author(s)
      軽部皓介,L. C. Peng,J. Masell,M. Hemmida,H.-A. Krug von Nidda,I. Kezsmarki,于 秀珍,十倉 好紀,田口 康二郎
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 小角中性子散乱によるアンチスキルミオン物質(Fe,Ni,Pd)3Pの異方的フラクタル磁区構造の研究2022

    • Author(s)
      軽部皓介,V. Ukleev,賀川史敬,十倉好紀,田口康二郎,J. S. White
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 磁気スキルミオンの安定性に関する探査と新物質開拓2022

    • Author(s)
      軽部皓介
    • Organizer
      日本物理学会第77回年次大会 若手奨励賞受賞記念講演(領域8)
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] S4対称性を持つ磁性体で観測された室温アンチスキルミオンと磁区構造2021

    • Author(s)
      軽部皓介,L. C. Peng,J. Masell,于秀珍,賀川史敬,十倉好紀,田口康二郎
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Transformation of metastable skyrmion lattices in room-temperature chiral magnets2020

    • Author(s)
      Kosuke Karube
    • Organizer
      APW-RIKEN-Tsinghua-Kavli workshop “Highlights on condensed matter physics”
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 磁気異方性制御によるアンチスキルミオンの安定化に成功 -トポロジカル磁気構造の安定化機構を解明-

    • URL

      https://www.riken.jp/press/2022/20220125_1/

    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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