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Spin dynamics in antiferromagnetic nanofilms studied by phonon-magnon interaction

Research Project

Project/Area Number 18H01859
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 29010:Applied physical properties-related
Research InstitutionOsaka University

Principal Investigator

Nagakubo Akira  大阪大学, 大学院工学研究科, 助教 (70751113)

Co-Investigator(Kenkyū-buntansha) 森山 貴広  京都大学, 化学研究所, 准教授 (50643326)
塩田 陽一  京都大学, 化学研究所, 助教 (70738070)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥14,300,000 (Direct Cost: ¥11,000,000、Indirect Cost: ¥3,300,000)
Keywords超音波 / 磁性体 / フォノン / マグノン / 相互作用 / NiO / フェムト秒パルスレーザ / TR-MOKE / 反強磁性体 / 共鳴 / 弾性定数 / スペクトロスコピー / 弾性波 / カップリング / ポンププローブ法 / 反強磁性 / スピントロニクス / ナノ薄膜 / 反強磁性ナノ薄膜 / フェムト秒パルスレーザー / 反強磁性共鳴
Outline of Final Research Achievements

In this study, we studied the fundamental phono properties of NiO and the interaction between magnon and GHz-range longitudinal phonon to reveal and apply the phonon-magnon coupling in antiferromagnets. Our measurement for Pt/NiO/Pt nanofilms revealed that the elastic constant of NiO largely changes depending on deposition conditions and substrates. From ultrasound resonance spectroscopy measurement for a single bulk crystal, we also found that the antiferromagnetic order seriously affects the phonon properties, which change with deformation modes. These results will contribute to further study and application of the phonon properties of antiferromagnetic films.

Academic Significance and Societal Importance of the Research Achievements

反強磁性体のフォノン特性およびマグノンとの相互作用は未だに不明な点が多い。本研究ではバルク単結晶体に対するモード毎の詳細な音響共振計測から反強磁性結合とフォノン特性との相関について知見をもたらし、また薄膜化した際の弾性特性は基板や成膜温度によって大きく変化することも見出した。これらは今後反強磁性体中におけるフォノン-マグノン相互作用を考察する上で非常に重要な役割を果たす。また強磁性体中における縦波フォノンと磁気モーメントの相互作用を解明した結果は今後さらなる高周波帯域におけるフォノンーマグノン相互作用の解明に貢献する。

Report

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

    (10 results)

All 2022 2021 2020 2018

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results) Presentation (7 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] The angular dependence of magnetization dynamics induced by a GHz range strain pulse2022

    • Author(s)
      Tojo Kakeru、Nagakubo Akira、Ogi Hirotsugu
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: SG Pages: SG1007-SG1007

    • DOI

      10.35848/1347-4065/ac4a04

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Elastic constant of dielectric nano-thin films using three-layer resonance studied by picosecond ultrasonics2021

    • Author(s)
      Fukuda Hiroki、Nagakubo Akira、Ogi Hirotsugu
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Issue: SD Pages: SDDA05-SDDA05

    • DOI

      10.35848/1347-4065/abec5a

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Elastic constants of beta tungsten thin films studied by picosecond ultrasonics and density functional theory2020

    • Author(s)
      Nagakubo A.、Lee H. T.、Ogi H.、Moriyama T.、Ono T.
    • Journal Title

      Applied Physics Letters

      Volume: 116 Issue: 2 Pages: 021901-021901

    • DOI

      10.1063/1.5131768

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Interaction between ultrasound and magnetization in ferromagnetic thin film studied by picosecond ultrasonics2021

    • Author(s)
      Kakeru Tojo, Akira Nagakubo, and Hirotsugu Ogi
    • Organizer
      he 42nd Symposium on Ultrasonic Electronics (USE2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Acoustic properties of metal/antiferromagnet epitaxial multilayers2021

    • Author(s)
      H. Fukuda, A. Nagakubo, H. Ogi
    • Organizer
      The 41th Symposium on Ultrasonic Electronics (USE 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] アモルファス酸窒化シリコン薄膜の音速の温度依存性:ゼロ温度係数の実現2018

    • Author(s)
      坪井誠也, 荻博次, 長久保白, 松田聡, 壁義郎, 是枝聡肇, 藤井康裕
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ピコ秒超音波法を用いたアルファ及びベータ型タングステンナノ薄膜の弾性率計測および重水素照射による機械特性の変化2018

    • Author(s)
      長久保白、土生善昭、Lee Heun Tae、上田良夫、荻博次
    • Organizer
      第79回応用物理学会秋期学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Resonance frequencies of AlN and metal freestanding multilayers studied by picosecond ultrasonics2018

    • Author(s)
      Akira Nagakubo, Tokihiro Nishihara, Hirotsugu Ogi
    • Organizer
      The 39th Symposium on Ultrasonic Electronics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Guided acoustic wave in a single Pt nanowire2018

    • Author(s)
      Hiroki Tamura, Akira Nagakubo, Teruo Ono, Hirotsugu Ogi
    • Organizer
      2018 IEEE International Ultrasonics Symposium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Picosecond-ultrasound study on interlayer interaction of monocrystal graphite2018

    • Author(s)
      A. Wake, H. Ogi, A. Nagakubo, K. Kusakabe, K. Murashima, M. Murakami
    • Organizer
      2018 IEEE International Ultrasonics Symposium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2023-01-30  

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