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Development of an x-ray magnetic microscope aiming observation of magnetic domains inside materials

Research Project

Project/Area Number 19H04405
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 80040:Quantum beam science-related
Research InstitutionNational Institutes for Quantum Science and Technology

Principal Investigator

Inami Toshiya  国立研究開発法人量子科学技術研究開発機構, 関西光科学研究所 放射光科学研究センター, 上席研究員 (30354989)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2019: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
Keywords磁気光学効果 / X線磁気円偏光発光 / 円偏光 / 特性X線 / 電磁鋼板 / 磁区 / 磁気顕微鏡 / X線 / MCPE / ランセット磁区 / X線磁気円二色性 / 磁気円二色性
Outline of Research at the Start

強磁性体の内部で磁区がどのように分布しているのか、それぞれの外部磁場に対する応答はどうなっているのか。この単純そうな問題は、永久磁石の保磁力向上や電磁鋼板の低鉄損化など応用研究に深く関わっているにもかかわらず、適切な測定手法が無いため未だ知られていない領域です。この問題に対し、近年、応募者はX線領域の新しい磁気光学効果「X線磁気円偏光発光」を発見しました。当該効果は物質透過能に優れ、磁性に感度が高いという特長があり、そこで本基盤研究では、このX線磁気円偏光発光を利用した磁気顕微鏡を構築し、実デバイスの磁区構造の観察を行い、デバイスの性能向上に寄与できる情報の取得を目指します。

Outline of Final Research Achievements

Functional magnetic materials are widely used in crucial devices that support our life. For instance, electrical steel sheets and/or permanent magnets are important components of motors, generators and transformers. To improve the magnetic properties of these materials, elucidation of the structure and motion of the magnetic domains (small areas in which all the magnetic moments are parallel to each other) under magnetic fields is indispensable. Nevertheless, the measurement of magnetic domains well below the surface of thick samples has been a longstanding problem. X-ray magnetic circularly polarized emission (XMCPE) is a new magneto-optical effect discovered in 2017, which is highly sensitive to the magnetism of 3d transition metal elements in the hard X-ray regime, where the penetration length is very long. In this study, a magnetic microscope that utilizes XMCPE was developed and magnetic domains well below the surface of an electrical steel sheet were successfully observed.

Academic Significance and Societal Importance of the Research Achievements

本研究では、表面近傍だけでなく、物質内部の磁区(磁気モーメントが一方向にそろった小さな領域)を観察できる磁気顕微鏡を開発した。金属など不透明な磁性体の内部の磁区観察は長年の課題であり、これまで材料内部の磁区は計算による推定や想像でしかなかった。実験的に内部の磁区を直接観察できれば、磁気特性の理解を進めることにつながり、学術的な意義は大きい。さらに、ここから実際の機能性磁性材料の特性向上につなげることができれば、機能性磁性材料が広く我々の生活に関わっていることから、大きな省エネルギー、省資源効果が期待でき、社会的意義にもつながる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (13 results)

All 2021 2020 2019 Other

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

  • [Journal Article] Sum rules of L-edge x-ray magnetic circularly polarized emission for 3d transition metals2021

    • Author(s)
      Koide Akihiro、Nomura Takuji、Inami Toshiya
    • Journal Title

      Physical Review B

      Volume: 104 Issue: 9

    • DOI

      10.1103/physrevb.104.094419

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Bulk-sensitive magnetic microscope utilizing x-ray magnetic circularly polarized emission2021

    • Author(s)
      Sugawara Kento、Inami Toshiya、Nakada Takahiro、Sakaguchi Yui、Takahashi Shin
    • Journal Title

      Journal of Applied Physics

      Volume: 130 Issue: 11 Pages: 113901-113901

    • DOI

      10.1063/5.0058201

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of conduction electron excitation on x-ray magnetic circularly polarized emission in itinerant ferromagnets2020

    • Author(s)
      Koide Akihiro、Nomura Takuji、Inami Toshiya
    • Journal Title

      Physical Review B

      Volume: 102 Issue: 22

    • DOI

      10.1103/physrevb.102.224425

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] X 線磁気円偏光発光における発光 X 線の角度依存性2020

    • Author(s)
      小出明広, 野村拓司, 稲見俊哉
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Theoretical investigation of x-ray magnetic circularly polarized emission in metallic iron2020

    • Author(s)
      Koide Akihiro, Nomura Takuji, Inami Toshiya
    • Organizer
      4th QST International Symposium
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] X線磁気円偏光発光を用いた2p-3d交換相互作用の抽出2020

    • Author(s)
      小出明広、稲見俊哉
    • Organizer
      第33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
      2019 Annual Research Report
  • [Presentation] X線磁気円偏光発光における 伝導電子の分極効果2020

    • Author(s)
      小出明広、野村拓司、稲見俊哉
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Magnetic Circular Dichroism in X-ray Fluorescence2019

    • Author(s)
      Inami Toshiya
    • Organizer
      International Conference on Inelastic X-ray scattering
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] X線磁気円偏光発光を用いた磁区観察手法の開発2019

    • Author(s)
      稲見俊哉、菅原健人、中田崇寛、阪口友唯、高橋真
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] X線磁気円偏光発光を利用した放射光磁気顕微鏡2019

    • Author(s)
      稲見俊哉、菅原健人、中田崇寛、阪口友唯、高橋真
    • Organizer
      第43回日本磁気学会学術講演会
    • Related Report
      2019 Annual Research Report
  • [Remarks] 放射光を使った磁石の奥まで透ける顕微鏡―X線発光の新原理を用い開発に成功―

    • URL

      https://www.qst.go.jp/site/press/20220125.html

    • Related Report
      2021 Annual Research Report
  • [Patent(Industrial Property Rights)] 磁化測定装置及び磁化測定方法2021

    • Inventor(s)
      稲見俊哉、菅原健人、綿貫徹、小出明広、野村拓司
    • Industrial Property Rights Holder
      量子科学技術研究開発機構
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2020 Annual Research Report
  • [Patent(Industrial Property Rights)] 磁化測定方法2021

    • Inventor(s)
      稲見俊哉、菅原健人、綿貫徹、小出明広、野村拓司
    • Industrial Property Rights Holder
      量子科学技術研究開発機構
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-058759
    • Filing Date
      2021
    • Related Report
      2020 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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