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Voltage control of spin-wave reflaction index and its application for voltage-controlled spin lens

Research Project

Project/Area Number 18K14118
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 29010:Applied physical properties-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Yamamoto Tatsuya  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 研究員 (20805139)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2018: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywordsスピントロニクス / 磁性 / 電圧制御 / 電圧スピン制御 / 磁性体超薄膜 / パラメトリック励振 / スピンダイナミクス / 電界効果 / 電圧効果 / スピンレンズ
Outline of Final Research Achievements

We have studied the voltage-controlled magnetic anisotropy (VCMA) effect to develop a novel technique which allows for high-speed, energy-efficient control of magnetization in ferromagnetic thin films. Our major scientific achievement would be the observation of parametric resonance induced by a microwave voltage pumping. In the conventional techniques using a microwave magnetic field, the excitation of parametric resonance requires a power of the order of mW, whereas our VCMA-based technique allowed to excite parametric resonance at 0.4 uW. The present technique is applicable not only for controlling the spin waves but also for magnetic memory devices based on VCMA-driven magnetization switching.

Academic Significance and Societal Importance of the Research Achievements

本研究の主要な成果である、マイクロ波電圧印加によるパラメトリック励振の技術はスピン波の電圧制御だけでなく、磁気メモリ素子における磁化反転の精度向上に応用することも可能である。また、本研究で開発した電圧波形の補正手法は、スピンダイナミクスの精密制御を可能とするものであり、外場によるスピン波の励起・同期現象を正しく理解する上で欠かすことのできない技術である。

Report

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

    (6 results)

All 2020 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Voltage-Driven Magnetization Switching Controlled by Microwave Electric Field Pumping2020

    • Author(s)
      T. Yamamoto, T. Nozaki, H. Imamura, S. Tamaru, K. Yakushiji, H. Kubota, A. Fukushima, and S. Yuasa
    • Journal Title

      Nano Letters

      Volume: 20 Issue: 8 Pages: 6012-6017

    • DOI

      10.1021/acs.nanolett.0c02022

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Accurate calculation and shaping of the voltage pulse waveform applied to a voltage-controlled magnetic random access memory cell2018

    • Author(s)
      Tamaru Shingo、Yamamoto Tatsuya、Nozaki Takayuki、Yuasa Shinji
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 7 Pages: 073002-073002

    • DOI

      10.7567/jjap.57.073002

    • NAID

      210000149255

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] マイクロ波重畳パルスによる電圧トルク磁化反転精度の改善2020

    • Author(s)
      山本竜也、野崎隆行、今村裕志、田丸慎吾、薬師寺啓、久保田均、福島章雄、鈴木義茂、湯浅新治
    • Organizer
      第67回応用物理学会 春季学術講演会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Improved accuracy of voltage-torque-driven magnetization switching using microwave-superimposed voltage pulse2019

    • Author(s)
      山本竜也、野崎隆行、今村裕志、田丸慎吾、薬師寺啓、久保田均、福島章雄、鈴木義茂、湯浅新治
    • Organizer
      第80回応用物理学会 秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Voltage-torque-driven magnetization switching using microwave-superimposed voltage pulse2019

    • Author(s)
      山本竜也、野崎隆行、今村裕志、田丸慎吾、薬師寺啓、久保田均、福島章雄、鈴木義茂、湯浅新治
    • Organizer
      Annual Conference on Magnetism and Magnetic Materials 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] 磁気記憶装置2019

    • Inventor(s)
      山本 竜也
    • Industrial Property Rights Holder
      産業技術総合研究所
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2019-007726
    • Filing Date
      2019
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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