• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of spin-wave resonators by multiple local spin-orbit torque excitations and their application to high-frequency devices

Research Project

Project/Area Number 21K04870
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 29010:Applied physical properties-related
Research InstitutionNational Institute of Technology(KOSEN), Oshima College

Principal Investigator

Koda Tetsunori  大島商船高等専門学校, 電子機械工学科, 教授 (80616079)

Co-Investigator(Kenkyū-buntansha) 遠藤 恭  東北大学, 工学研究科, 教授 (50335379)
室賀 翔  秋田大学, 理工学研究科, 准教授 (60633378)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsスピン波 / 磁化歳差運動 / スピン軌道トルク / 位相同期 / 強磁性共鳴 / ST-FMR
Outline of Research at the Start

スピン波の波源を複数形成すると、スピン波は伝搬先にある波源、すなわち局所的な磁化歳差運動と相互作用を起こす。本研究は非磁性金属・強磁性体複合膜に電流を流すと生じるスピン軌道トルクを利用して複数箇所の磁化歳差運動励起源を形成し、それぞれの波源から発生するスピン波と磁化歳差運動間の位相同期現象を利用したスピン波共振器の創生を目指す。
スピン波共振器からは高コヒーレントなマイクロ波を周囲に放射するために新奇高周波デバイスへの展開を可能とする。さらに、強磁性薄膜内には高コヒーレントなスピン波が伝搬するため、スピン波干渉効果を用いた論理演算素子等のスピン波を利用した革新的次世代基盤技術構築を可能とする。

Outline of Final Research Achievements

In this study, we aimed to create a spin-wave resonator utilizing the phase-locking phenomenon between spin waves and locally excited magnetization precession motion using the spin-orbit torque at the interface between a nonmagnetic metal and a ferromagnetic thin film caused by applying a DC current to a nonmagnetic metal. The interaction between local precession and spin waves was evaluated by the ST-FMR method, and a guideline for the quantitative evaluation of the interaction was obtained. Furthermore, the current density dependence, which determines the amount of torque applied to the local region, was investigated in detail by numerical simulation, and it was found that the frequency of the precessional motion varies significantly with the current density, indicating that this phenomenon is caused by the twist in the magnetization direction between the local regions.

Academic Significance and Societal Importance of the Research Achievements

本研究で得られたスピン波と局所磁化歳差運動間相互作用の評価はそのトルク成分の特徴を捉えられたことはスピン波間相互作用を活用する高周波デバイスの高効率励起を設計する評価方法を付与する重要な成果であるといえる。さらに、数値シミュレーションからは条件によっては磁化が膜厚方向にねじれる現象が生じる可能性があることが示唆され、それに伴い、スピン波の波長が大きく変化することが示唆された。本研究で得られたこれらの成果を活用することで、大きな非線形変化を本系に付与することが可能であり、高周波デバイスのみならず、物理リザバーコンピューティングに代表されるエッジコンピューティングへの応用展開が期待される。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (14 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 2 results) Presentation (11 results) (of which Int'l Joint Research: 7 results)

  • [Journal Article] Control of Magnetization Precession Frequency Using Current Density of Spin-Orbit Torque Applied to Local Area2023

    • Author(s)
      Koda Tetsunori、Nakagawa Ao、Muroga Sho、Endo Yasushi
    • Journal Title

      2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers)

      Pages: 1-2

    • DOI

      10.1109/intermagshortpapers58606.2023.10228553

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Micromagnetics Simulation of Highly Efficient Oscillation of Magnetization in a Ferromagnetic Local Areas via Spin Waves Induced by Spin-Orbit Torque2023

    • Author(s)
      Koda Tetsunori、Muroga Sho、Endo Yasushi
    • Journal Title

      2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers)

      Volume: 91 Pages: 1-2

    • DOI

      10.1109/intermagshortpapers58606.2023.10228207

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Slot Line Waveguide Induced Magnetization Dynamics of Perpendicularly Magnetized La-YIG Thin Film2022

    • Author(s)
      Koda Tetsunori、Muroga Sho、Endo Yasushi
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: 58 Issue: 2 Pages: 1-4

    • DOI

      10.1109/tmag.2021.3089769

    • Related Report
      2021 Research-status Report
  • [Presentation] Micromagnetics Simulation of Distance Dependence of Multiple Spin Wave Sources Excited by Spin-Orbit Torque2023

    • Author(s)
      Ao Nakagawa, Kento Kawahara, Sho Muroga, Takayuki Ishibashi, Yasushi Endo, Tetsunori Koda
    • Organizer
      8th STI-Gigaku
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ST-FMR法による局所磁化ダイナミクスとスピン波との相互作用評価2023

    • Author(s)
      浜田 竜希, 室賀 翔, 石橋 隆幸, 遠藤 恭, 神田 哲典
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] スピン軌道トルクで励起される局所磁化ダイナミクスの励起電流密度 および距離依存性の数値シミュレーション2023

    • Author(s)
      中川 碧, 室賀 翔, 石橋 隆幸, 遠藤 恭, 神田 哲典
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Micromagnetics Simulation of Highly Efficient Oscillation of Magnetization in a Ferromagnetic Local Areas via Spin Waves induced by Spin-Orbit Torque2023

    • Author(s)
      T. Koda, S. Muroga, Y. Endo
    • Organizer
      Intermag 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Control of Magnetization Precession Frequency using Current Density of Spin-Orbit Torque Applied to Local Area2023

    • Author(s)
      T. Koda, A. Nakagawa, S. Muroga, Y. Endo
    • Organizer
      Intermag 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of local magnetization precession and spin-wave interaction using ST-FMR2022

    • Author(s)
      Tetsunori Koda, Sho Muroga, Yasushi Endo
    • Organizer
      第83回 応用物理学会 秋季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Micromagnetics Simulation of Current Density Dependence on Magnetization dynamics in Local Area Excited by Spin-Orbit Torque2022

    • Author(s)
      Ao Nakagawa, Kento Kawahara, Sho Muroga, Takayuki Ishibashi, Yasushi Endo, Tetsunori Koda
    • Organizer
      7th STI-Gigaku 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Study on Numerical Simulation of ST-FMR signal for the evaluation of the interaction between local magnetization dynamics and spin waves2022

    • Author(s)
      Ryuki Hamada, Sho Muroga, Takayuki Ishibashi, Yasushi Endo, Tetsunori Koda
    • Organizer
      7th STI-Gigaku 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] スピン軌道トルクを利用した局所領域における磁化ダイナミクスの共鳴励起に関するマイクロマグネティクスシミュレーション2022

    • Author(s)
      神田哲典、室賀翔、遠藤恭
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Evaluation of interaction between local magnetization dynamics and spin waves measured by ST-FMR2021

    • Author(s)
      Tetsunori Koda, Sho Muroga Shuichiro Hashi, Yasushi Endo
    • Organizer
      Intermag 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Enhancement of magnetization dynamics via spin waves by slot line waveguide for perpendicularly magnetized yttrium iron garnet2021

    • Author(s)
      Tetsunori Koda, Sho Muroga, Yasushi Endo
    • Organizer
      Intermag 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi