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Control and dynamics of transitions of magnetic structure by room temperature deformation

Research Project

Project/Area Number 22K20363
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Shunsuke Mori  国立研究開発法人理化学研究所, 創発物性科学研究センター, 特別研究員 (60962975)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords透過型電子顕微鏡 / ローレンツ電子顕微鏡法 / 磁気構造 / 応力 / ナノインデンテーション / 有限要素法 / 相転移
Outline of Research at the Start

本研究では、透過型電子顕微鏡(TEM)を用いてスキルミオンと呼ばれる特徴的な磁気構造体を観察し、室温での応力が及ぼす影響を調査する。スキルミオンはその1つ1つが規則正しく配列することで、六角形のスキルミオン格子(Sk格子)を呈する。このようなSk格子の応力下における構造転移やそのダイナミクスを直接的に解明し、磁気構造転移を用いた新たな歪み駆動型デバイスへの展開を目指す。

Outline of Final Research Achievements

Magnetic materials were processed and observed under localized compression. The topological magnetic material used in the experiments exhibits a helical magnetic structure at room temperature and zero field. Using this texture as the initial state, the effects of strain were investigated. Simultaneously with Lorentz transmission electron microscopy, direct measurements of uniaxial compressive deformation and strain of the samples were carried out. The results show that the helical magnetic structure bends depending on the magnitude and direction of the compressive strain.
Stress and magnetic structure were analyzed by finite element method and micromagnetic simulation, suggesting that local compressive stress induces magnetic structure changes and that the stability of the helical magnetic structure depends on the direction of strain.

Academic Significance and Societal Importance of the Research Achievements

近年、歪みにより物質の相転移を誘起し、それに伴う物性変化を用いて超省エネルギーなメモリやセンサとして応用する技術が注目されている。このような相転移は結晶構造変化に関する研究が主である一方で、スピントロニクスへの応用が期待される磁気構造などは低温で歪みに大きく応答すると知られている。しかしながら、室温における実空間観察例は少ない。本研究では、室温かつゼロ磁場の状況化で、単軸圧縮歪みにより磁気構造のドメインを制御できることの観察に成功し、歪み誘起相転移を用いた電子デバイス開発の基盤になることが期待される。

Report

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

    (5 results)

All 2024 2023 Other

All Presentation (4 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Presentation] 歪みが磁気構造に及ぼす影響とその実空間観察2024

    • Author(s)
      森 竣祐, ヤシン フェミ, 軽部 晧介, 中島 清美, 田口 康二郎, 十倉 好紀, 于 秀珍
    • Organizer
      日本顕微鏡学会 第80回学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Real space observations of the effect of mechanical strain on magnetic textures2024

    • Author(s)
      Shunsuke Mori, Fehmi Sami Yasin, Kosuke Karube, Kiyomi Nakajima, Yasujiro Taguchi, Yoshinori Tokura, Xiuzhen Yu
    • Organizer
      CEMS Symposium on Emergent Quantum Materials 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 窒化炭素系ポリマー薄膜の高分解能観察2023

    • Author(s)
      森 竣祐, Wu Niannian, 三苫 伸彦, 相田 卓三, 于 秀珍
    • Organizer
      日本顕微鏡学会 第79回学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] High-resolution microstructural analyses of polymeric carbon nitride incorporated with graphitic carbon2023

    • Author(s)
      Shunsuke Mori, Niannian Wu, Nobuhiko Mitoma, Takuzo Aida, Xiuzhen Yu
    • Organizer
      2023 Materials Research Society (MRS) Spring Meeting&Exhibit
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Remarks]

    • URL

      https://researchmap.jp/Shunsuke_Mori

    • Related Report
      2023 Annual Research Report

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Published: 2022-09-01   Modified: 2025-01-30  

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