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Study to elucidate a driving mechanism of moving magnetic skyrmions in a nonequilibrium steady state and under an external field

Research Project

Project/Area Number 17K14327
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics II
Research InstitutionTohoku University

Principal Investigator

Daisuke Okuyama  東北大学, 多元物質科学研究所, 助教 (30525390)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords非平衡定常状態の物理 / 中性子散乱 / 磁気スキルミオン / 非平衡状態の物理 / 磁性
Outline of Final Research Achievements

To elucidate a nonequilibrium steady state of a magnetic skyrmion lattice under an external force, we study a small angle neutron diffraction experiment of typical chiral magent MnSi under an electric current flow. In our study, the deformation of the moving magnetic skyrmion lattice in MnSi under electric current flow observed. A spatially inhomogeneous rotation of the skyrmion lattice, with an inverse rotation sense for opposite sample edges, is observed for current densities greater than a threshold value jt ~ 1 MA/m2. Our result show that skyrmion lattices under current flow experience significant friction near the sample edges due to pinning and locally deforms like plastic matter when driven under electric current. This plastic deformation of the magnetic skyrmion lattice is a critical effect that must be considered for anticipated skyrmion-based applications at the nanoscale.

Academic Significance and Societal Importance of the Research Achievements

今回得られた研究結果より、外力によって駆動している磁気スキルミオン格子は試料端でのピニング効果により摩擦のような力を受け塑性変形を起こすことが分かった。駆動中の塑性変形はこれまで行われてきた磁気スキルミオン研究では考慮されず、薄膜や細線等のデバイスとして磁気スキルミオンを利用する際にバルク試料と異なった性質を示す一因になっているのではと予想する。本研究成果は磁気スキルミオンを使った記憶媒体などを実現するのに必要不可欠な新しい知見を示したため、本研究の波及効果は大きいと考えている。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (54 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (8 results) Journal Article (10 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 10 results,  Open Access: 3 results) Presentation (34 results) (of which Int'l Joint Research: 9 results,  Invited: 3 results) Remarks (2 results)

  • [Int'l Joint Research] NIST/ORNL(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] PSI/EPFL(スイス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ANSTO(オーストラリア)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] NIST/ORNL(米国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] PSI(スイス)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] ANSTO(Australia)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] NIST(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] PSI(Switzerland)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Effect of Ge substitution on magnetic properties in the itinerant chiral magnet MnSi2019

    • Author(s)
      Aji Seno, Ishida Hidesato, Okuyama Daisuke, Nawa Kazuhiro, Hong Tao, Sato Taku J.
    • Journal Title

      Physical Review Materials

      Volume: 3 Issue: 10 Pages: 104408-104408

    • DOI

      10.1103/physrevmaterials.3.104408

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Deformation of the moving magnetic skyrmion lattice in MnSi under electric current flow2019

    • Author(s)
      D. Okuyama, M. Bleuel, J.S. White, Q. Ye, J. Krzywon, G. Nagy, Z.Q. Im, I. Zivkovic, M. Bartkowiak, H.M. Ronnow, S. Hoshino, J. Iwasaki, N. Nagaosa, A. Kikkawa, Y. Taguchi, Y. Tokura, D. Higashi, J.D. Reim, Y. Nambu, T.J. Sato
    • Journal Title

      Communications Physics

      Volume: 2 Issue: 1 Pages: 79-79

    • DOI

      10.1038/s42005-019-0175-z

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 電流下における磁気スキルミオン格子の塑性変形2019

    • Author(s)
      奥山大輔, 東大樹, 南部雄亮, 佐藤卓
    • Journal Title

      波紋

      Volume: 29 Pages: 171-175

    • NAID

      130007949162

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Controlling the stoichiometry of the triangular lattice antiferromagnet Li1+xZn2-yMo3O82019

    • Author(s)
      Sandvik Kim E.、Okuyama Daisuke、Nawa Kazuhiro、Avdeev Maxim、Sato Taku J.
    • Journal Title

      Journal of Solid State Chemistry

      Volume: 271 Pages: 216-221

    • DOI

      10.1016/j.jssc.2018.12.064

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Crystal Structure in Quadrupolar Kondo Candidate PrTr2Al20 (Tr = Ti and V)2019

    • Author(s)
      Okuyama Daisuke、Tsujimoto Masaki、Sagayama Hajime、Shimura Yasuyuki、Sakai Akito、Magata Atsushi、Nakatsuji Satoru、Sato Taku J
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 88 Issue: 1 Pages: 015001-015001

    • DOI

      10.7566/jpsj.88.015001

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Degenerate ground state in the classical pyrochlore antiferromagnet Na3Mn(CO3)2Cl2018

    • Author(s)
      Nawa Kazuhiro、Okuyama Daisuke、Avdeev Maxim、Nojiri Hiroyuki、Yoshida Masahiro、Ueta Daichi、Yoshizawa Hideki、Sato Taku J.
    • Journal Title

      Physical Review B

      Volume: 98 Issue: 14

    • DOI

      10.1103/physrevb.98.144426

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Spin Seebeck effect in the polar antiferromagnet α-Cu2V2O72017

    • Author(s)
      Y. Shiomi, R. Takashima, D. Okuyama, G. Gitgeatpong, P. Piyawongwatthana, K. Matan, T. J. Sato, E. Saitoh
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 18 Pages: 180414-180414

    • DOI

      10.1103/physrevb.96.180414

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Thermal stability and irreversibility of skyrmion-lattice phases in Cu2OSeO32017

    • Author(s)
      K. Makino, J. D. Reim, D. Higashi, D. Okuyama, T. J. Sato, Y. Nambu, E. P. Gilbert, N. Booth, S. Seki, Y. Tokura
    • Journal Title

      Physical Review B

      Volume: 95 Issue: 13

    • DOI

      10.1103/physrevb.95.134412

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Impact of minute-time-scale kinetics on the stabilization of the skyrmion-lattice in Cu2OSeO32017

    • Author(s)
      J. D. Reim, K. Makino, D. Higashi, Y. Nambu, D. Okuyama, T. J Sato, E. P. Gilbert, N. Booth, S. Seki
    • Journal Title

      J. Phys.: Conf. Ser.

      Volume: 828 Pages: 012004-012004

    • DOI

      10.1088/1742-6596/828/1/012004

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Creating the hydrogen absorption capability of CeNi5 through the addition of Al2017

    • Author(s)
      R. Yamagishi, T. Kojima, S. Kameoka, D. Okuyama, T. J. Sato, C.i Nishimura, A. P. Tsai
    • Journal Title

      International J. Hydrogen Energy

      Volume: 42 Issue: 34 Pages: 21832-21840

    • DOI

      10.1016/j.ijhydene.2017.07.072

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] マルチフェロイック正方晶ペロブスカイトSr1/2Ba1/2MnO3の強誘電原子変位の観測2020

    • Author(s)
      奥山大輔,山内邦彦,酒井英明,田口康二郎,十倉好紀,杉本邦久,佐藤卓,小口多美夫
    • Organizer
      日本物理学会第75回年次大会(2020年), 名古屋
    • Related Report
      2019 Annual Research Report
  • [Presentation] 電流下における磁気スキルミオン格子の動力学2019

    • Author(s)
      奥山大輔
    • Organizer
      展開共同研究 B 及び小口中村研合同研究会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] カイラル磁性体Pr5Ru3Al2の中性子小角散乱2019

    • Author(s)
      奥山大輔
    • Organizer
      東北大金研-CROSSワークショップ「J-PARCとJRR-3の相補利用による偏極中性子科学の新展開」
    • Related Report
      2019 Annual Research Report
  • [Presentation] 電流中の磁気スキルミオン格子のダイナミクス2019

    • Author(s)
      奥山大輔
    • Organizer
      東北大金研-CROSSワークショップ「J-PARCとJRR-3の相補利用による偏極中性子科学の新展開」
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 量子ビームによる反転対称性が破れた磁性体の磁気的・電気的特性発現機構の解明2019

    • Author(s)
      奥山大輔
    • Organizer
      物質・デバイス領域共同研究拠点第9回活動報告会/平成30年度ダイナミック・アライアンス成果
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] カイラル磁性体の電流効果に関する研究2019

    • Author(s)
      奥山大輔,山内邦彦,小口多美夫,佐藤卓
    • Organizer
      物質・デバイス領域共同研究拠点第9回活動報告会/平成30年度ダイナミック・アライアンス成果報告会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 中性子散乱によるトポロジカル磁性の研究2019

    • Author(s)
      奥山大輔,那波和宏,佐藤卓
    • Organizer
      物質・デバイス領域共同研究拠点第9回活動報告会/平成30年度ダイナミック・アライアンス成果報告会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Spatial Inhomogeneous Deformation of the Moving Magnetic Skyrmion Lattice in MnSi under Electric Current Flow2019

    • Author(s)
      D. Okuyama,M. Bleuel,J.S. White,Q. Ye,J. Krzywon,G. Nagy,Z.Q. Im,I. Zivkovic,M. Bartkowiak,H.M. Ronnow,S. Hoshino,J. Iwasaki,N. Nagaosa,A. Kikkawa,Y. Taguchi,Y. Tokura,D. Higashi,J.D. Reim,Y. Nambu,T.J. Sato
    • Organizer
      International Conference on Strongly Correlated Electron Systems (SCES) 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Magnetic properties in the itinerant chiral magnet MnSi1-xGex2019

    • Author(s)
      S. Aji,H. Ishida,D. Okuyama,K. Nawa,T. Hong,S. Yano,T. J Sato
    • Organizer
      International Conference on Strongly Correlated Electron Systems 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 中性子回折による磁気スキルミオン格子の電流駆動観測2019

    • Author(s)
      奥山大輔,山内邦彦,小口多美夫,佐藤卓
    • Organizer
      第7回アライアンス若手研究交流会プログラム
    • Related Report
      2019 Annual Research Report
  • [Presentation] Plastic deformation of the moving magnetic skyrmion lattice in MnSi under electric current flow2019

    • Author(s)
      D. Okuyama,M. Bleuel,J.S. White,Q. Ye,J. Krzywon,G. Nagy,Z.Q. Im,I. Zivkovic,M. Bartkowiak,H. M. Ronnow,S. Hoshino,J. Iwasaki,N. Nagaosa,A. Kikkawa,Y. Taguchi,Y. Tokura,D. Higashi,J. D. Reim,Y. Nambu,T. J. Sato
    • Organizer
      The 3rd Asia-Oceania Conference on Neutron Scattering 2019 (AOCNS 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 中性子回折による電流下の磁気スキルミオン格子の非平衡定常/非定常状態2019

    • Author(s)
      奥山大輔,東大樹,南部雄亮,佐藤卓
    • Organizer
      第19回東北大学多元物質科学研究所研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Absolute structure of α-Cu2V2O72019

    • Author(s)
      Pharit Piyawongwatthana,Daisuke Okuyama,Kazuhiro Nawa,Kittiwit Matan,Taku J Sato
    • Organizer
      日本物理学会2019秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 立方晶カイラル磁性体Pr5Ru3Al2の磁気相図及び中性子小角散乱2019

    • Author(s)
      奥山大輔,牧野晃也,J. D. Reim,E. P. Gilbert,N. Booth,大石一城,山内邦彦,小口多美夫,佐藤卓
    • Organizer
      日本物理学会2019秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 中性子非弾性散乱と放射光精密構造解析によるPrTr2Al20(Tr = Ti, V)の結晶構造特性と結晶場解析2019

    • Author(s)
      奥山大輔, 辻本真規, 佐賀山基, 志村恭通, 酒井明人, 眞方篤史, O. Garlea, B. Weing, 中辻知, 佐藤卓
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Magnetic properties in the itinerant chiral magnet MnSi1-xGex2019

    • Author(s)
      Seno Aji, Hidesato Ishida, Daisuke Okuyama, Kazuhiro Nawa, Tao Hong, and Taku J Sato
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] PrTr2Al20 (Tr = Ti, V)の精密結晶構造と結晶場の解析2019

    • Author(s)
      奥山大輔, 辻本真規, 佐賀山基, 志村恭通, 酒井明人, 眞方篤史, 中辻知, 佐藤卓
    • Organizer
      2018年度量子ビームサイエンスフェスタ
    • Related Report
      2018 Research-status Report
  • [Presentation] Kinetics of the magnetic skyrmion lattice in MnSi under direct/alternating electric current2019

    • Author(s)
      D. Okuyama, M. Bleuel, Q. Ye, N. Nagaosa, A. Kikkawa, Y. Taguchi, Y. Tokura, J. D. Reim, Y. Nambu and T. J. Sato
    • Organizer
      The 2nd Symposium for World Leading Research Centers ‐ Materials Science and Spintronics ‐
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] MnSi の定常/変動電流中の磁気スキルミオン格子ダイナミクス2018

    • Author(s)
      奥山大輔, M. Bleuel, 永長直人, 吉川明子, 田口康二郎, 十倉好紀, 東大樹, J. D. Reim, 南部雄亮, 佐藤卓
    • Organizer
      日本中性子科学会 第18回年会
    • Related Report
      2018 Research-status Report
  • [Presentation] MnSiにおける変動電流中の磁気スキルミオン格子のダイナミクス2018

    • Author(s)
      奥山大輔, M. Bleuel, Q. Ye, P. Butler, 永長直人, 吉川明子, 田口康二郎, 十倉好紀, 東大樹, 南部雄亮, 佐藤卓
    • Organizer
      日本物理学会2018年度秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] MnSiにおける電流中の磁気スキルミオン格子の塑性流動的な振る舞い2018

    • Author(s)
      奥山大輔, M. Bleuel, Q. Ye, P. Butler, 永長直人, 吉川明子, 田口康二郎, 十倉好紀, 東大樹, 南部雄亮, 佐藤卓
    • Organizer
      日本物理学会2018年度秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 歪んだカゴメ格子反強磁性体Yb3Ni11Ge4の磁気散漫散乱2018

    • Author(s)
      高橋満, 那波和宏, Matthias Frontzek, 奥山大輔, 吉田雅洋, 植田大地, 吉沢英樹, 野尻浩之, 佐藤卓, Maxim Avdeev
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Stabilizing the Skyrmion Phase in Cu2OSeO3: The Influence of Field, Temperature and Time2018

    • Author(s)
      Johannes D. Reim, Koya Makino, Daiki Higashi, Daisuke Okuyama, Taku J Sato, Yusuke Nambu, Elliot P. Gilbert, Norman Booth, Shinichiro Seki, Yoshinori Tokura
    • Organizer
      International Conference on Magnetism 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Degenerate ground state in classical pyrochlore antiferromagnet Na3Mn(CO3)2Cl2018

    • Author(s)
      Kazuhiro Nawa, Daisuke Okuyama, Maxim Avdeev, Hiroyuki Nojiri, Masahiro Yoshida, Daichi Ueta, Hideki Yoshizawa, and Taku J Sato
    • Organizer
      International Conference on highly Frustrated Magnetism 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] パイロクロア格子反強磁性体Na3T(CO3)2Cl(T=Co, Mn)における磁化過程2018

    • Author(s)
      那波和宏, 野尻浩之, 奥山大輔, M. Avdeev, 吉田雅洋, 植田大地, 吉澤英樹, 佐藤卓
    • Organizer
      日本物理学会第70回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] パイロクロア格子反強磁性体Na3T(CO3)2Cl(T=Co, Mn)の磁性2017

    • Author(s)
      那波和宏, 奥山大輔, M. Avdeev, 野尻浩之, 吉田雅洋, 植田大地, 吉澤英樹, 佐藤卓
    • Organizer
      日本中性子科学会第17回年会
    • Related Report
      2017 Research-status Report
  • [Presentation] MnSiで観測される磁気スキルミオン反射の回転とブロードニングの特異な電流密度及び温度依存性2017

    • Author(s)
      奥山大輔, M. Bleuel, Q. Ye, P. Butler, 星野晋太郎, 岩崎惇一, 永長直人, 吉川明子, 田口康二郎, 十倉好紀, 東大樹, 南部雄亮, 佐藤卓
    • Organizer
      日本物理学会2017年度秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Controlling the stoichiometry of the triangular lattice antiferromagnet Li1+xZn2-yMo3O82017

    • Author(s)
      K. Sandvik, K. Nawa, D. Okuyama, J. Reim, M. Avdeev, M. Matsuda, T. J. Sato
    • Organizer
      日本物理学会2017年度秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] S=5/2パイロクロア格子反強磁性体Na3Mn(CO3)2Clの構造と磁性2017

    • Author(s)
      那波和宏, 奥山大輔, M. Avdeev, 野尻浩之, 佐藤卓
    • Organizer
      日本物理学会2017年度秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 歪んだ籠目格子系Yb3Ni11Ge4の構造と低温物性2017

    • Author(s)
      高橋満, 那波和宏, 奥山大輔, 佐藤卓
    • Organizer
      日本物理学会2017年度秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Influence of path and time on the stabilization of the skyrmion-lattice phases in Cu2OSeO32017

    • Author(s)
      J. D. Reim, K. Makino, D. Higashi, D. Okuyama, T. J. Sato, Y. Nambu, E. P. Gilbert , N. Booth, S. Seki, Y. Tokura
    • Organizer
      日本物理学会2017年度秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Magnetic structure determined by small angle neutron and powder neutron scatterings in cubic chiral crystal Pr5Ru3Al22017

    • Author(s)
      K. Makino, D. Okuyama, M. Avdeev, K. Ohishi, K. Yamauchi, T. Oguchi, T. J. Sato
    • Organizer
      International Conference on Neutron Scattering 2017 (ICNS 2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Phase stability and higher order peaks of the skyrmion lattice in Cu2OSeO32017

    • Author(s)
      J. D. Reim, K. Makino, D. Higashi, Y. Nambu, D. Okuyama, T. J. Sato, E. P. Gilbert, N. Booth, S. Seki, Y. Tokura
    • Organizer
      International Conference on Neutron Scattering 2017 (ICNS 2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Helical magnetic structure in cubic chiral crystal Pr5Ru3Al22017

    • Author(s)
      K. Makino, D. Okuyama, M. Avdeev, K. Ohishi, K. Yamauchi, T. Oguchi, T. J. Sato
    • Organizer
      24th Congress and General Assembly of the International Union of Crystallography (IUCR2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] 流動中の磁気スキルミオン格子の変形挙動観測に成功

    • URL

      http://www2.tagen.tohoku.ac.jp/lab/news_press/20190712/

    • Related Report
      2019 Annual Research Report
  • [Remarks] 若手研究者のタイトなつながりが、斬新な成果を生み出す

    • URL

      http://five-star.tagen.tohoku.ac.jp/talk/talk_01.html

    • Related Report
      2019 Annual Research Report

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Published: 2017-04-28   Modified: 2022-02-21  

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