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

Relationship between magnetic anisotropy and anisotropic electronic structure studied by soft x-ray spectroscopy

Research Project

Project/Area Number 20K14416
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
Research InstitutionJapan Atomic Energy Agency (2022)
Tokyo University of Science (2020-2021)

Principal Investigator

Shibata Goro  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 物質科学研究センター, 研究職 (20747026)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords磁気異方性 / 強磁性体 / X線磁気円二色性 / 薄膜 / 遷移金属化合物 / 軌道磁気モーメント / 電子軌道 / 磁性体 / X線分光 / 層状物質 / 磁性薄膜 / 軟X線分光 / 電子構造
Outline of Research at the Start

本研究は、スピントロニクスへの応用が期待されている新奇強磁性物質、特にその薄膜や多層膜を対象に、磁気特性の発現機構を電子状態の観点から理解することを目的とする。X線磁気円二色性(XMCD)を中心とする放射光分光法を用い、これらの物質を構成する各元素の価数やスピン・軌道磁気モーメントなど、物性を理解するうえで重要な情報を明らかにする。特に、近年申請者が開発してきたベクトルマグネットX線二色性実験装置を用い、従来の装置では測定が困難であったXMCDの磁場角度依存性の実験を行う。これにより、従来の分光法では得られなかった電子状態の異方性を明らかにし、磁気異方性の起源の解明につなげる。

Outline of Final Research Achievements

In this study, by using synchrotron spectroscopy techniques such as X-ray magnetic circular dichroism (XMCD) and X-ray magnetic linear dichroism (XMLD), we revealed the electronic states of ferromagnetic thin films and layered magnetic materials which can be applied for spintronics, and discussed the origin of the magnetic anisotropy of them. From the XMCD results of magnetic materials which shows perpendicular magnetic anisotropy, we pointed out that the perpendicular magnetic anisotropy can be seen in two dimensional systems with unquenched orbital magnetic moments both experimentally and theoretically. Moreover, by using a vector-magnet apparatus with which we can vary the direction of magnetic field freely, we performed XMLD experiments of layered ferromagnetic thin films, and succeeded in the direct observation of the change of the ‘shape’ of electron orbitals upon magnetic transitions.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、磁気異方性を決定する要因である、磁性材料中の電子軌道の形状を推定する新しい手法を提供するものであり、手法開発の意味で学術的重要性があると考えられる。また、磁気異方性の強い材料はハードディスク等の記録媒体や高い保磁力を持つ永久磁石としても実社会で用いられており、これらの材料における磁気異方性の制御に関する指針を得ることは応用上の意義もあると考えられる。

Report

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

    (14 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (4 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results)

  • [Int'l Joint Research] ラトガース大学(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] 浦項工科大学校(韓国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] ラトガース大学(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] 浦項工科大学校(韓国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Origin of magnetically dead layers in spinel ferrites MFe2O4 grown on Al2O3: Effects of post-deposition annealing studied by XMCD2023

    • Author(s)
      Yosuke Nonaka, Yuki K. Wakabayashi, Goro Shibata, Shoya Sakamoto, Keisuke Ikeda, Zhendong Chi, Yuxuan Wan, Masahiro Suzuki, Arata Tanaka, Masaaki Tanaka, and Atsushi Fujimori
    • Journal Title

      Physical Review Materials

      Volume: 7 Issue: 4 Pages: 044413-044413

    • DOI

      10.1103/physrevmaterials.7.044413

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cr doping-induced ferromagnetism in the spin-glass Cd1-Mn Te studied by x-ray magnetic circular dichroism2022

    • Author(s)
      Verma V.K.、Sakamoto S.、Ishikawa K.、Singh V.R.、Ishigami K.、Shibata G.、Kadono T.、Koide T.、Kuroda S.、Fujimori A.
    • Journal Title

      Physica B: Condensed Matter

      Volume: 642 Pages: 414129-414129

    • DOI

      10.1016/j.physb.2022.414129

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Large Orbital Magnetic Moment and Strong Perpendicular Magnetic Anisotropy in Heavily Intercalated Fe<sub><i>x</i></sub>TiS<sub>2</sub>2021

    • Author(s)
      Shibata Goro、Won Choongjae、Kim Jaewook、Nonaka Yosuke、Ikeda Keisuke、Wan Yuxuan、Suzuki Masahiro、Koide Tsuneharu、Tanaka Arata、Cheong Sang-Wook、Fujimori Atsushi
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 125 Issue: 23 Pages: 12929-12936

    • DOI

      10.1021/acs.jpcc.1c02345

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 硬X線磁気円二色性によるBa2CaOsO6の磁気転移・多極子秩序に関する研究2023

    • Author(s)
      芝田悟朗, 林浩章, 河村直己, 岡本淳, Di-Jing Huang, 田中新, Sergey Streltsov, 山浦一成, 藤森淳
    • Organizer
      第36回日本放射光学会年会・放射光科学合同シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Perpendicular magnetic anisotropy of iron-intercalated transition-metal disulfides studied by x-ray magnetic circular dichroism2022

    • Author(s)
      Goro Shibata
    • Organizer
      OPTICS & PHOTONICS International Congress 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Angle-dependent XMCD as a Probe of Anisotropic Spin-density Distribution2022

    • Author(s)
      Goro Shibata
    • Organizer
      The 26th Hiroshima International Symposium on Synchrotron Radiation
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 強い垂直磁気異方性を示す層状磁性体FexTaS2のX線磁気円二色性: FexTiS2との比較2022

    • Author(s)
      芝田悟朗, Choongjae Won, Jaewook Kim, 野中洋亮, 池田啓祐, 万宇軒, 鈴木雅弘, 小出常晴, 田中新, Sang-Wook Cheong, 齋藤智彦, 藤森淳
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 薄膜化により磁気転移温度を上昇させたマルチフェロイック物質Fe2Mo3O8の硬X線光電子分光2021

    • Author(s)
      芝田悟朗,毛司辰,保井晃,高木康多,片山司,長谷川哲也,齋藤智彦
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Magnetic anisotropy and anisotropic electronic structures studied by angle-dependent XMCD2020

    • Author(s)
      Goro Shibata
    • Organizer
      Conference on Laser and Synchrotron Radiation Combination Experiment (LSC) 2020 in OPTICS & PHOTONICS International Congress (OPIC) 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 薄膜化により磁気転移温度を上昇させたマルチフェロイック物質Fe2Mo3O8のX線磁気円・線二色性2020

    • Author(s)
      芝田悟朗,毛司辰,池田啓祐,和達大樹,齋藤智彦,片山司, 長谷川哲也,藤森淳
    • Organizer
      日本物理学会2020年秋季大会
    • 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