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

Study on generation and high-speed driving of skyrmion in the multilayered films with antiferromagnetic coupling

Research Project

Project/Area Number 20K03836
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
Research InstitutionNagoya Institute of Technology

Principal Investigator

Tanaka Masaaki  名古屋工業大学, 工学(系)研究科(研究院), 准教授 (50508405)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsスピントロニクス / 層間磁気結合 / 相関交換結合 / スキルミオン / 相関磁気結合
Outline of Research at the Start

本研究では「強磁性層/非磁性層/強磁性層」の3層からなる薄膜で上層と下層の強磁性層が反強磁性結合で互いの磁化が反対を向く構造体を用いてスキルミオンを安定化を行い,高速で電流駆動できる膜厚構成の探索を行う.そのために実験とシミュレーションから反強磁性結合が存在する系でのスキルミオンの安定化機構の調査を行い,スキルミオンの電流による挙動と反強磁性結合の強さとの相関関係を調べる.

Outline of Final Research Achievements

The stabilization of the skyrmion-like bubble domains (BDs) using antiferromagnetic interlayer exchange coupling (IEC) of "ferromagnetic /nonmagnetic /ferromagnetic" wires was investigated. Micromagnetic simulations clarified that the BDs can be stabilized using antiferromagnetic IEC in the wires without the interfacial Dzyaloshinskii-Moriya interaction and that the driven direction of the BDs via spin-orbital torque (SOT) can become parallel to the electric current direction. It was also found that the magnetic moment in the domain walls (DWs) depends on the antiferromagnetic IEC strength, and the stability of the Neel-type DW increases with an increase in the antiferromagnetic IEC strength. As a consequence of this stability, the SOT affects effectively on the magnetic moment of the DWs and the DW velocity increases. These results imply that the antiferromagnetic IEC can be applied for the stabilization of the BDs and the control of the DW velocity in magnetic domain-based memories.

Academic Significance and Societal Importance of the Research Achievements

反強磁性結合を有する細線では磁気スキルミオンバブル磁区(BD)が安定化でき、細線を流れる電流方向に対してBDが平行に移動できることを明らかにした。反強磁性結合を用いることでBDの安定性を自由に制御でき、また細線上のBDを電流で安定して駆動できるなど、本研究から得られた知見は磁気メモリーの研究に対して有益な情報を与えると考えている。また、反強磁性結合を用いることで磁壁駆動の速度が上昇することが明らかになっており、この研究成果は磁壁駆動メモリーの省電力化・高速化に貢献すると考えている。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Correlation between interlayer exchange coupling and domain wall velocity in multilayered magnetic wires2023

    • Author(s)
      Suzuki Takafumi、Tanaka Masaaki、Ohmasa Tatsuro、Honda Shunsuke、Honda Syuta、Awano Hiroyuki、Mibu Ko
    • Journal Title

      Journal of Magnetism and Magnetic Materials

      Volume: 565 Pages: 170218-170218

    • DOI

      10.1016/j.jmmm.2022.170218

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stabilization of N?el-type domain walls in multilayered magnetic wires using antiferromagnetic interlayer exchange coupling2020

    • Author(s)
      Tanaka Masaaki、Shimazaki Musashi、Ohmasa Tatsuro、Suzuki Takafumi、Honda Shunsuke、Honda Syuta、Awano Hiroyuki、Mibu Ko
    • Journal Title

      Journal of Applied Physics

      Volume: 128 Issue: 6 Pages: 063902-063902

    • DOI

      10.1063/5.0013481

    • Related Report
      2020 Research-status Report
  • [Journal Article] Current-induced linear motion of antiferromagnetically coupled skyrmion-like bubble domains stabilized without Dzyaloshinskii?Moriya interaction2020

    • Author(s)
      Honda Syuta、Sugahara Takamasa、Tanaka Masaaki
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 53 Issue: 43 Pages: 435001-435001

    • DOI

      10.1088/1361-6463/aba14f

    • Related Report
      2020 Research-status Report
  • [Presentation] 非磁性重金属層と強磁性層の界面状態がスピン注入効率に与える影響2022

    • Author(s)
      阿部大悟,新實史也,杉野真健,田中雅章,本多周太, 粟野博之, 壬生攻
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Effect of Interfacial Co Thickness in Nonmagnetic-heavy-metal/Ferromagnetic-metal Wires on the Electric-current-driven Phenomena of Magnetic Domain Walls2022

    • Author(s)
      M. Sugino, D. Abe, F. Niimi, T.Suzuki, M. A. Tanaka, S. Honda, H. Awano
    • Organizer
      ICMFS-2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 反強磁性結合を有する磁性細線における磁壁移動速度と反強磁性結合の強さの相関関係の調査2021

    • Author(s)
      鈴木隆文、阿部大悟、新實史也、田中雅章、本多周太、粟野博之、壬生攻
    • Organizer
      第80回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 反強磁性結合する強磁性多層膜細線に生成した磁壁の電流駆動速度の非磁性中間層膜厚依存性の評価2020

    • Author(s)
      田中雅章,鈴木隆文,大政達郎,本田俊輔,本多周太,粟野博之,壬生攻
    • Organizer
      日本物理学会 2020秋季大会
    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi