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Electric-field control of antiferromagnetic spin configuration via antiferromagnetic/ferromagnetic transition and applications for memory devices

Research Project

Project/Area Number 21K14196
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionOsaka University

Principal Investigator

Takamasa Usami  大阪大学, 大学院基礎工学研究科, 特任研究員(常勤) (30880273)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords界面マルチフェロイク構造 / 磁気メモリ / 電界制御 / 電界磁性変調 / 反強磁性
Outline of Research at the Start

磁気記録素子の記録密度を向上させるために磁気状態が外的な擾乱に対して堅牢であり,正味の磁化を持たない反強磁性材料の利用が検討されているが,反強磁性材料の磁気状態を自由に変調する手法は未だ確立されていない.申請者は,新規磁気記録機構の基盤技術構築を念頭に,反強磁性スピン配列の電界変調技術を確立することを目指す.具体的には,反強磁性・強磁性磁気相転移を示す磁性材料を,磁性薄膜と強誘電体基板によって構成される界面マルチフェロイク構造に組み込むことで,電界による反強磁性スピン配列変調を実証する.

Outline of Final Research Achievements

We proposed an electric-field (E) control of antiferromagnetic (AFM) spin configuration using multiferroic heterostructures composed of magnetic materials showing an AFM-ferromagnetic (FM) phase transition and piezoelectric materials. To demonstrate the electric-field (E) control, an efficient E control of the FM magnetization vectors by piezoelectricity is required. In this study, we find that the growth of the FM materials with an appropriate crystal orientation and the demonstration of moderate magnetic anisotropy are important for the efficient E control of the magnetization vectors.

Academic Significance and Societal Importance of the Research Achievements

電界により磁性を制御できる界面マルチフェロイク構造は、磁性メモリデバイスなどの低消費電力動作に資する技術と期待されているが、高効率な動作のための設計指針は未確立な部分が多い。本成果は、界面マルチフェロイク構造を利用した強磁性状態の磁化ベクトルの高効率制御を達成するために、磁性層の結晶面方位の選択ならびに磁気異方性の大きさの調整が重要な要素であることを見出しており、界面マルチフェロイク構造を利用したメモリデバイスの設計に資する成果であるといえる。

Report

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

    (18 results)

All 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (14 results) (of which Int'l Joint Research: 7 results,  Invited: 1 results)

  • [Int'l Joint Research] University of York(英国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Converse magnetoelectric coupling coefficient greater than 10-6 s/m in perpendicularly magnetized Co/Pd multilayers on Pb(Mg1/3Nb2/3)O3-PbTiO32023

    • Author(s)
      T. Usami, Y. Sanada, Y. Shiratsuchi, S. Yamada, T. Kanashima, R. Nakatani, and K. Hamaya
    • Journal Title

      Journal of Magnetism and Magnetic Materials

      Volume: 570 Pages: 170532-170532

    • DOI

      10.1016/j.jmmm.2023.170532

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Giant converse magnetoelectric effect in a multiferroic heterostructure with polycrystalline Co2FeSi2022

    • Author(s)
      Shumpei Fujii, Takamasa Usami, Yu Shiratsuchi, Adam M. Kerrigan, Amran Mahfudh Yatmeidhy, Shinya Yamada, Takeshi Kanashima, Ryoichi Nakatani, Vlado K. Lazarov, Tamio Oguchi, Yoshihiro Gohda, and Kohei Hamaya
    • Journal Title

      NPG Asia Materials

      Volume: 14 Issue: 1 Pages: 43-43

    • DOI

      10.1038/s41427-022-00389-1

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Converse magnetoelectric effect in epitaxial Co2MnSi/Pb(Mg1/3Nb2/3)O3-PbTiO3 multiferroic heterostructures2022

    • Author(s)
      Usami Takamasa、Fujii Shumpei、Yamada Shinya、Shiratsuchi Yu、Kanashima Takeshi、Nakatani Ryoichi、Hamaya Kohei
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: - Issue: 8 Pages: 1-1

    • DOI

      10.1109/tmag.2022.3145521

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Giant converse magnetoelectric effect in Co2FeSi/PMN-PT multiferroic heterostructures2023

    • Author(s)
      Takamasa Usami, Kohei Hamaya
    • Organizer
      PRICM11 (The 11th Pacific Rim International Conference on Advanced Materials and Processing)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Operando XMCD and EXAFS spectroscopies for orbital control by reversible strain at Co2FeSi/PMN-PT interface2023

    • Author(s)
      Jun Okabayashi, Takamasa Usami, Amran Yatmeidhy, Yoshihiro Gohda, Kohei Hamaya
    • Organizer
      Intermag 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Growth and magnetoelectric effect of epitaxial Co3Mn films on piezoelectric Pb(Mg1/3Nb2/3)O3-PbTiO3(001)2023

    • Author(s)
      Yuichi Murakami, Takamasa Usami, Yu Shiratsuchi, Yuya Sanada, Shinya Yamada, Ryoichi Nakatani, Kohei Hamaya
    • Organizer
      Intermag 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Converse magnetoelectric effect in bcc Co3Mn/PMN-PT(001) multiferroic heterostructures2023

    • Author(s)
      Yuichi Murakami, Takamasa Usami, Yu Shiratsuchi, Yuya Sanada, Shinya Yamada, Ryoichi Nakatani, Kohei Hamaya
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Operando XMCD for magnetic anisotropy control by reversible strain at Fe3Si/PMN-PT interface2023

    • Author(s)
      Jun Okabayashi, Takamasa Usami, Kohei Hamaya
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Jun Okabayashi, Takamasa Usami, Yu Shiratsuchi, Ryoichi Nakatani, Kohei Hamaya2022

    • Author(s)
      Operando XMCD and EXAFS Spectroscopies for Orbital Control by Reversible Strain at Co2FeSi/PMN-PT Interface
    • Organizer
      2022 MRS Fall Meeting & Exhibit
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Giant Converse Magnetoelectric Effect in Co2-Heusler Alloy/Pb(Mg1/3Nb2/3)O3-PbTiO3 Multiferroic Heterostructures2022

    • Author(s)
      Takamasa Usami, Shumpei Fujii, Yu Shiratsuchi, Amran Yatmeidhy, Shinya Yamada, Takeshi Kanashima, Ryoichi Nakatani, Yoshihiro Gohda, Kohei Hamaya
    • Organizer
      2022 MRS Fall Meeting & Exhibit
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Converse magnetoelectric effect in perpendicularly magnetized [Co/Pd]5/Pb(Mg1/3Nb2/3)O3-PbTiO3(011) multiferroic heterostructures2022

    • Author(s)
      Yuya Sanada , Takamasa Usami , Shinya Yamada , Takeshi Kanashima , Yu Shiratsuchi , Ryoichi Nakatani , Kohei Hamaya
    • Organizer
      2022年第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Converse magnetoelectric effect in Co-based Heusler alloy/PMN-PT(011) multiferroic heterostructures2022

    • Author(s)
      Takamasa Usami , Shumpei Fujii , Amran Mahfudh Yatmeidhy , Yoshihiro Gohda , Jun Okabayashi , Shinya Yamada , Takeshi Kanashima , Yu Shiratsuchi , Ryoichi Nakatani , Kohei Hamaya
    • Organizer
      2022年第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Co2MnSi/Pb(Mg1/3Nb2/3)O3-PbTiO3 interfacial multiferroic heterostructures2022

    • Author(s)
      Takamasa Usami , Shumpei Fujii , Shinya Yamada , Yu Shiratsuchi , Ryoichi Nakatani , Kohei Hamaya
    • Organizer
      2022 Joint MMM-INTERMAG
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Co/Pd多層膜/PMN-PT構造における垂直磁気異方性の電界変調2021

    • Author(s)
      真田祐彌 , 宇佐見喬政 , 山田晋也 , 金島岳 , 白土優 , 中谷亮一 , 浜屋宏平
    • Organizer
      第26回半導体スピン工学の基礎と応用
    • Related Report
      2021 Research-status Report
  • [Presentation] Electric-field modulation of magnetic anisotropy in epitaxial Co2FeSi/Pb(Mg1/3Nb2/3)O3-PbTiO3 multiferroic heterostructures2021

    • Author(s)
      Shumpei Fujii , Takamasa Usami , Shinya Yamada , Yu Shiratsuchi , Ryoichi Nakatani , Kohei Hamaya
    • Organizer
      The Material Research Meeting 2021 (MRM2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Piezoelectric effect on anisotropic magnetoresistance in epitaxial CoFe films2021

    • Author(s)
      Takamasa Usami , Hiroyoshi Itoh , Shumpei Fujii , Takeshi Kanashima , Kohei Hamaya
    • Organizer
      2021年第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Crystal orientation dependence of converse magnetoelectric effect in Co2FeSi/Fe/Pb(Mg1/3Nb2/3)O3-PbTiO3 multiferroic heterostructures2021

    • Author(s)
      Shumpei Fujii , Takamasa Usami , Shinya Yamada , Takeshi Kanashima , Yu Shiratsuchi , Ryoichi Nakatani , Kohei Hamaya
    • Organizer
      2021年第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2024-01-30  

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