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サブテラヘルツ超高速スピン波伝搬の観測

Research Project

Project/Area Number 14J04778
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Applied materials
Research InstitutionTohoku University

Principal Investigator

飯浜 賢志  東北大学, 工学研究科, 特別研究員(DC2)

Project Period (FY) 2014-04-25 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2015: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2014: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywordsスピン波伝搬 / pump-probe法 / 磁気緩和 / 時間分解磁気光学カー効果 / 垂直磁化膜 / FePd
Outline of Annual Research Achievements

本年度はスピン波伝搬を空間、時間分解で測定するためのポンプ・プローブ法を用いた空間、時間分解磁気光学カー効果装置の立ち上げを行った.装置の自動計測システムの構築を行い, まずPy薄膜を用いてスピン波伝搬の観測を試みた.ポンプ光によってスピン波を励起し, そのポンプ光が励起したスピン波の波束を明瞭に観測した.スピン波の波束の振幅,群速度を定量的に評価し,線形化LLG方程式を用いた理論計算結果との比較を行った.実験結果は定量的によく説明できることがわかり,ポンプ光による減磁気が励起したスピン波であることがわかった.この成果を国際学会で発表し(2015 International Conference on Solid State Devices and Materials),また学術雑誌に投稿した(S. Iihama et al., arXiv : 1601.0724v1).

また垂直磁気異方性を有し, 低ダンピング定数を有することが期待できるFePd薄膜をフェムト秒パルスレーザーを用いた時間分解磁気光学カー効果を用いて系統的な測定を行った.超短パルスレーザーが励起する超高速減磁に関して詳細に調べた結果を学術雑誌に投稿し, 受理された(S. Iihama et al., Journal of Physics D: Applied Physics 49, (2016) 035002).またダンピング定数を詳細に調べ, まとめた結果に関して国際学会で発表した(20th International Conference on Magnetism, JSPS Core-to-Core Workshop on New-Concept Spintronics Devices).今後,学術雑誌に投稿し,報告する予定である.

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • Research Products

    (13 results)

All 2016 2015 2014

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 2 results,  Acknowledgement Compliant: 3 results) Presentation (9 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Ultrafast demagnetization of L10 FePt and FePd ordered alloys2016

    • Author(s)
      Satoshi Iihama, Yuta Sasaki, Hiroshi Naganuma, Mikihiko Oogane, Shigemi Mizukami, and Yasuo Ando
    • Journal Title

      J. Phys. D: Appl. Phys

      Volume: 49 Issue: 3 Pages: 035002-035002

    • DOI

      10.1088/0022-3727/49/3/035002

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Magnetization Dynamics and Damping for <i>L</i>1<sub>0</sub>-FePd Thin Films with Perpendicular Magnetic Anisotropy2015

    • Author(s)
      S. Iihama, M. Khan, H. Naganuma, M. Oogane, T. Miyazaki, S. Mizukami and Y. Ando
    • Journal Title

      Journal of the Magnetics Society of Japan

      Volume: 39 Issue: 2 Pages: 57-61

    • DOI

      10.3379/msjmag.1501R004

    • NAID

      130004951237

    • ISSN
      1882-2924, 1882-2932
    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Low precessional damping observed for L10-ordered FePd epitaxial thin films with large perpendicular magnetic anisotropy2014

    • Author(s)
      S. Iihama, A. Sakuma, H. Naganuma, M. Oogane, T. Miyazaki, S. Mizukami and Y. Ando
    • Journal Title

      Applied Physics Letters

      Volume: 105 Issue: 14 Pages: 1424031-4

    • DOI

      10.1063/1.4897547

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Gilbert damping constants of Ta/CoFeB/MgO(Ta) thin films measured by optical detection of precessional magnetization dynamics2014

    • Author(s)
      Satoshi Iihama, Shigemi Mizukami, Hiroshi Naganuma, Mikihiko Oogane, Yasuo Ando, and Terunobu Miyazaki
    • Journal Title

      Physical Review B

      Volume: 89 Issue: 17 Pages: 1744161-6

    • DOI

      10.1103/physrevb.89.174416

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Presentation] Fast precessional magnetization dynamics and damping in L10-FePd epitaxial thin films with large perpendicular magnetic anisotropy2015

    • Author(s)
      S. Iihama, A. Sakuma, H. Naganuma, M. Oogane, S. Mizukami, and Y. Ando
    • Organizer
      JSPS Core-to-Core Workshop on New-Concept Spintronics Devices
    • Place of Presentation
      宮城, RIEC,Tohoku University
    • Year and Date
      2015-11-13
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Spatially Resolved Pump-probe Magneto-optical Kerr Effect in Permalloy Films2015

    • Author(s)
      S. Iihama, Y. Sasaki, Y. Ando, and S. Mizukami
    • Organizer
      2015 International Conference on Solid State Devices and Materials
    • Place of Presentation
      北海道, Sapporo Convention Center
    • Year and Date
      2015-09-23
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Low Gilbert damping and high magnetic anisotropy in L10-FePd epitaxial thin films grown on MgO and SrTiO3 single crystal substrates2015

    • Author(s)
      S. Iihama, H. Naganuma, M. Oogane, S. Mizukami, and Y. Ando
    • Organizer
      20th International Conference on Magnetism
    • Place of Presentation
      スペイン, バルセロナ
    • Year and Date
      2015-07-09
    • Related Report
      2015 Annual Research Report 2014 Annual Research Report
    • Int'l Joint Research
  • [Presentation] NiFe薄膜における光励起スピン波伝搬2015

    • Author(s)
      飯浜賢志, 佐々木悠太, 安藤康夫, 水上成美
    • Organizer
      平成26年度スピン変換年次報告会
    • Place of Presentation
      京都, 京都大学桂キャンパス
    • Year and Date
      2015-03-03 – 2015-03-04
    • Related Report
      2014 Annual Research Report
  • [Presentation] Magnetization Precession with Low Damping for Perpendicularly Magnetized L10-FePd Films Grown on SrTiO3 Substrates2014

    • Author(s)
      Satoshi Iihama, Shigemi Mizukami, Hiroshi Naganuma, Mikihiko Oogane, Terunobu Miyazaki, and Yasuo Ando
    • Organizer
      第75回応用物理学会秋季学術講演会
    • Place of Presentation
      北海道, 北海道大学
    • Year and Date
      2014-09-17 – 2014-09-20
    • Related Report
      2014 Annual Research Report
  • [Presentation] Spin-Wave Propagation Detected using All-Optical TR-MOKE Microscope in Permalloy Films2014

    • Author(s)
      Satoshi Iihama, Shigemi Mizukami, Motoki Endo, Yuta Sasaki, Atsushi Sugihara, Hiroshi Naganuma, Mikihiko Oogane, Terunobu Miyazaki, and Yasuo Ando
    • Organizer
      第75回応用物理学会秋季学術講演会
    • Place of Presentation
      北海道, 北海道大学
    • Year and Date
      2014-09-17 – 2014-09-20
    • Related Report
      2014 Annual Research Report
  • [Presentation] 垂直磁化L10-FePd薄膜における低ダンピング定数2014

    • Author(s)
      飯浜賢志, 水上成美, 永沼博, 大兼幹彦, 宮崎照宣, 安藤康夫
    • Organizer
      第38回日本磁気学会学術講演会
    • Place of Presentation
      神奈川, 慶應義塾大学日吉キャンパス
    • Year and Date
      2014-09-02 – 2014-09-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] Fast magnetization precession and damping of L10-FePd epitaxial thin films grown on SrTiO3 substrate2014

    • Author(s)
      Satoshi Iihama, Shigemi Mizukami, Hiroshi Naganuma, Terunobu Miyazaki, Mikihiko Oogane, and Yasuo Ando
    • Organizer
      IEEE International Conference on Microwave Magnetics 2014
    • Place of Presentation
      宮城, 国際センター
    • Year and Date
      2014-06-29 – 2014-07-02
    • Related Report
      2014 Annual Research Report
  • [Presentation] Low Gilbert damping observed in L10-FePd thin films with large perpendicular magnetic anisotropy2014

    • Author(s)
      Satoshi Iihama, Shigemi Mizukami, Hiroshi Naganuma, Terunobu Miyazaki, Mikihiko Oogane, and Yasuo Ando
    • Organizer
      12th RIEC International Workshop on Spintronics
    • Place of Presentation
      宮城, 東北大通研
    • Year and Date
      2014-06-25 – 2014-06-27
    • Related Report
      2014 Annual Research Report

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Published: 2015-01-22   Modified: 2024-03-26  

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