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Theory of spin-wave-induced electric polarization in magnetic insulators

Research Project

Project/Area Number 19K21040
Project/Area Number (Other) 18H05855 (2018)
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund (2019)
Single-year Grants (2018)
Review Section 0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

Yamamoto Kei  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 先端基礎研究センター, 研究職 (10746811)

Project Period (FY) 2018-08-24 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsスピン波 / 磁性薄膜 / 磁性体 / 強誘電体 / 表面音波 / スピントロニクス / 磁性絶縁体
Outline of Research at the Start

磁気の波(スピン波)は単純な電気信号よりも多くの情報を低エネルギーで運ぶ事ができるため、情報機器の性能向上に向けた基礎現象として注目されている。応用上特に重要なのは磁気の波と電気信号の変換機構である。絶縁体中の磁気の波は金属中よりさらにエネルギー消費が小さいため省エネルギー化の役に立つ可能性があるが、電気信号への有効な変換機構はこれまでのところ知られていない。本研究はミクロな電子物性とマクロな対称性についての考察を組み合わせて絶縁体中での磁気の波と電気信号の変換機構を提案することを目標とした研究計画である。

Outline of Final Research Achievements

In this research project, we studied spin waves, i.e. propagating oscillations of magnetic moments, when the magnetic medium does not possess spatial inversion symmetry. Although we were not able to complete the initially proposed study of generating electric polarisation from spin wave dynamics, we discovered several closely related phenomena and established their theoretical descriptions. Specifically, we found that when a magnetic film is attached to the surface of an electrically polar substrate, the spin waves acquire a diode-like property where they achieve practically unidirectional transmission, and they become capable of travelling spatially up to 1 mm, an improvement of orders of magnitude in comparison with bare magnetic films. These new findings might help realising information transfer devices utilising spin waves in magnetic thin films.

Academic Significance and Societal Importance of the Research Achievements

スピン波は金属だけでなく絶縁体中も伝搬し、かつ磁気的な自由度であるスピンに情報を担うことができるため、情報処理技術において従来の金属や半導体を用いたエレクトロニクスでは実現できない機能を実現させるための基礎現象として注目されている。本研究成果によって明らかにされたスピン波の一方向伝搬性や長距離伝搬性は、スピン波をマイクロ波信号処理に用いるためには不可欠となる要素であり、新しい物理現象の開拓という学術的価値と将来の技術応用に向けた機能性向上の両面で意義を持つ。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Annual Research Report
  • Research Products

    (18 results)

All 2021 2020 2019 Other

All Int'l Joint Research (7 results) Journal Article (6 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (4 results) (of which Int'l Joint Research: 4 results,  Invited: 4 results) Remarks (1 results)

  • [Int'l Joint Research] Beihang University(中国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University College London(英国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Ecole Polytechnique Federale de Lausanne(スイス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Max Planck Institute Hamburg(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] University College London(英国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Technische Universitaet Kaiserslautern(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University College London(英国)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Long decay length of magnon-polarons in BiFeO3/La0.67Sr0.33MnO3 heterostructures2021

    • Author(s)
      Zhang Jianyu、Chen Mingfeng、Chen Jilei、Yamamoto Kei、Wang Hanchen、Hamdi Mohammad、Sun Yuanwei、Wagner Kai、He Wenqing、Zhang Yu、Ma Ji、Gao Peng、Han Xiufeng、Yu Dapeng、Maletinsky Patrick、Ansermet Jean-Philippe、Maekawa Sadamichi、Grundler Dirk、Nan Ce-Wen、Yu Haiming
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 7528-7528

    • DOI

      10.1038/s41467-021-27405-2

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Interaction between surface acoustic waves and spin waves in a ferromagnetic thin film2021

    • Author(s)
      Kei Yamamoto , Mingran Xu , Jorge Puebla , Yoshichika Otani , Sadamichi Maekawa
    • Journal Title

      Journal of Magnetism and Magnetic Materials

      Volume: 545 Pages: 168672-168672

    • DOI

      10.1016/j.jmmm.2021.168672

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Acoustic ferromagnetic resonance and spin pumping induced by surface acoustic waves2020

    • Author(s)
      Puebla Jorge、Xu Mingran、Rana Bivas、Yamamoto Kei、Maekawa Sadamichi、Otani Yoshichika
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: - Issue: 26 Pages: 264002-264002

    • DOI

      10.1088/1361-6463/ab7efe

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nonreciprocal surface acoustic wave propagation via magneto-rotation coupling2020

    • Author(s)
      Xu Mingran、Yamamoto Kei、Puebla Jorge、Baumgaertl Korbinian、Rana Bivas、Miura Katsuya、Takahashi Hiromasa、Grundler Dirk、Maekawa Sadamichi、Otani Yoshichika
    • Journal Title

      Science Advances

      Volume: 6 Issue: 32 Pages: 1-4

    • DOI

      10.1126/sciadv.abb1724

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Non-reciprocal Pumping of Surface Acoustic Waves by Spin Wave Resonance2020

    • Author(s)
      Yamamoto Kei、Yu Weichao、Yu Tao、Puebla Jorge、Xu Mingran、Maekawa Sadamichi、Bauer Gerrit
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 89 Issue: 11 Pages: 113702-113702

    • DOI

      10.7566/jpsj.89.113702

    • NAID

      210000158549

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Topological Characterization of Classical Waves: The Topological Origin of Magnetostatic Surface Spin Waves2019

    • Author(s)
      Yamamoto Kei、Thiang Guo Chuan、Pirro Philipp、Kim Kyoung-Whan、Everschor-Sitte Karin、Saitoh Eiji
    • Journal Title

      Physical Review Letters

      Volume: 122 Issue: 21 Pages: 217201-217201

    • DOI

      10.1103/physrevlett.122.217201

    • NAID

      120007185891

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Three-magnon instability in a cavity2021

    • Author(s)
      山本慧
    • Organizer
      5th Symposium for The Core Research Clusters for Materials and Spintronics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Non-reciprocal pumping of surface acoustic waves by spin wave resonance2020

    • Author(s)
      Kei Yamamoto
    • Organizer
      CEMS Topical Meeting Online on "Magnon-phonon coupling"
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Topological characterization of magneto-static surface spin waves2020

    • Author(s)
      Kei Yamamoto
    • Organizer
      APW-RIKEN-Tsinghua-Kavli workshop 2020 on "Highlights on condensed matter physics"
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] "Topological characterisation of classical waves: The topological origin of magnetostatic surface spin waves2019

    • Author(s)
      Kei Yamamoto
    • Organizer
      Topomagnetism is coming: Relativity and correlations in topological magnets, Mainz
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 磁気の波とトポロジー-「波」を抽象的数学でひも解く

    • URL

      https://academist-cf.com/journal/?p=11723

    • Related Report
      2019 Research-status Report

URL: 

Published: 2018-08-27   Modified: 2024-03-26  

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