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Elucidation of AC-spin-current dynamics by time-resolved X-FMR imaging

Research Project

Project/Area Number 17H04920
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Electronic materials/Electric materials
Research InstitutionJapan Synchrotron Radiation Research Institute

Principal Investigator

Ohkochi Takuo  公益財団法人高輝度光科学研究センター, 分光・イメージング推進室, 主幹研究員 (00435596)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥20,930,000 (Direct Cost: ¥16,100,000、Indirect Cost: ¥4,830,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2018: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2017: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Keywordsマイクロ波共鳴 / 強磁性共鳴 / 光電子顕微鏡 / 時間分解計測 / イメージング / 磁気ダイナミクス / 放射光 / 時間分解測定 / 磁性 / スピン流 / ダイナミクス
Outline of Final Research Achievements

In this subject, the X-ray imaging system for investigating ferromagnetic resonance which has capabilities of “real-time”, “real-space” and “element-specific” analysis was developed, for the sake of developments in ultrahigh-speed and energy-saving telecommunicating magnetic devices. The tough challenge, development of a special sample holder designed to input microwaves in a narrow space just below an objective lens with high bias voltage of a photoemission electron microscope, was attained. Even though practical dynamic imaging under ferromagnetic resonance precession of the magnetic materials has not been demonstrated yet, guidelines for the extensive studies and applications have been collected through this subject.

Academic Significance and Societal Importance of the Research Achievements

本課題では、高速・省エネの新規磁気通信デバイスの開発を狙いとして、微細加工された磁性材料における磁化歳差運動の伝搬を「実時間で」「元素選択的に」とらえることを目指した研究開発を行った。これにより、構成元素に特徴的な運動状態を解析するとともに、実空間解析でしか分からない「欠陥による特性劣化を含めた解析」「微小領域の狙い撃ち解析」などもでき、理想系・単一材料系からの見解とのギャップを埋めた知見が得られる。本研究の成果を活かしてスピン運動のピンポイント計測「時間分解X-FMRイメージング法」を世界に先駆けて標準化し、グリーンデバイス開発を世界規模で加速させていきたい。

Report

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

    (11 results)

All 2019 2018 2017

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Present status of photoemission electron microscope newly installed in SPring-8 for time-resolved nanospectroscopy2019

    • Author(s)
      Takuo Ohkochi, Hitoshi Osawa, Akinobu Yamaguchi, Hidenori Fujiwara, Masaki Oura
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: 11 Pages: 118001-118001

    • DOI

      10.7567/1347-4065/ab4b12

    • NAID

      210000157281

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Real-space and pulse-by-pulse analysis of domain wall creep induced by spin-Hall torque2019

    • Author(s)
      Ohkochi Takuo、Kim Kab-Jin、Kim Sanghoon、Yoshimura Yoko、Tanigawa Hironobu、Ohshima Norikazu、Koyama Tomohiro、Kotsugi Masato、Chiba Daichi、Ono Teruo、Kinoshita Toyohiko
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: 2 Pages: 023001-023001

    • DOI

      10.7567/1347-4065/aaf628

    • NAID

      210000135283

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optical control of magnetization dynamics in Gd-Fe-Co films with different compositions2017

    • Author(s)
      Takuo Ohkochi, Hidenori Fujiwara, Masato Kotsugi, Hirokazu Takahashi, Roman Adam, Akira Sekiyama, Tetsuya Nakamura, Arata Tsukamoto, Claus M. Schneider, Hiroto Kuroda, Elvis F. Arguelles, Mamoru Sakaue, Hideaki Kasai, Masakiyo Tsunoda, Shigemasa Suga, and Toyohiko Kinoshita
    • Journal Title

      Applied Physics Express

      Volume: 10 Issue: 10 Pages: 1030021-4

    • DOI

      10.7567/apex.10.103002

    • NAID

      210000135995

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 静磁・交換エネルギー発現の時間スケールの同定 ~時分割計測のための試料物性の制御~2019

    • Author(s)
      *大河内 拓雄、大浦 正樹、大澤 仁志、山口 明啓、藤原 秀紀、関山 明、木下 豊彦
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 磁気ダイナミクス解析の進展を目指した 光電子顕微鏡装置の新規導入2019

    • Author(s)
      *大河内 拓雄、大浦 正樹、大澤 仁志、山口 明啓、藤原 秀紀
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Present Status of Development and Utilization of Soft X-ray Photoemission Electron Microscopes in SPring-82019

    • Author(s)
      Takuo Ohkochi
    • Organizer
      X-ray Imaging Optics 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Determination of magnetization alignment speed by observing nucleation process of magnetic vortices2019

    • Author(s)
      *Takuo Ohkochi, Masaki Oura, Hitoshi Osawa, Akinobu Yamaguchi, Hidenori Fujiwara, Akira Sekiyama, Toyohiko Kinoshita
    • Organizer
      the 64th Annual Conference on Magnetism and Magnetic Materials
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Direct observation of nucleation process of magnetic vortex structure by means of time-resolved photoemission electron microscopy2019

    • Author(s)
      *Takuo Ohkochi, Masaki Oura, Hitoshi Osawa, Akinobu Yamaguchi, Hidenori Fujiwara, Akira Sekiyama, Toyohiko Kinoshita
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 時間分解顕微分光解析の進展を目指した新しい光電子顕微鏡装置の導入2019

    • Author(s)
      *大河内 拓雄、大浦 正樹、大沢 仁志、山口 明啓、藤原 秀紀
    • Organizer
      第32回日本放射光学会年会・放射光科学合同シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 磁気渦構造における磁気エネルギー発現の時間軸解析2019

    • Author(s)
      *大河内 拓雄、大浦 正樹、大沢 仁志、山口 明啓、藤原 秀紀、関山 明、木下 豊彦
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 放射光光電子顕微鏡で視る電子/磁気状態 ~顕微XAFSから磁気ダイナミクスまで~2018

    • Author(s)
      大河内 拓雄
    • Organizer
      第8回光科学異分野横断萌芽研究会
    • Related Report
      2018 Annual Research Report
    • Invited

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Published: 2017-04-28   Modified: 2021-02-19  

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