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Electronic state of half-metal-type Heusler alloy proved by resonant inelastic soft X-ray scattering in magnetic field

Research Project

Project/Area Number 18H01690
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26010:Metallic material properties-related
Research InstitutionTohoku University

Principal Investigator

Umetsu Rie  東北大学, 金属材料研究所, 教授 (60422086)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2020: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2019: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
Keywordsハーフメタル型強磁性体 / スピントロニクス / 電子状態 / 共鳴非弾性X線散乱 / 異方性磁気抵抗
Outline of Final Research Achievements

Soft X-ray resonance inelastic X-ray scattering (RIXS) measurements were performed on candidate materials for the Heulser alloy, which is theoretically predicted to have a spin polarization of 100% around the Fermi level in the electronic state.
For Mn2VAl and Co2MnSi, clear magnetic circular dichroism (MCD) was observed in the RIXS spectrum of the 2p3/2 absorption peaks of Mn, V, and Co. It was found that the sign of MCD of Mn was different between them, and it reflected the difference in the electronic state of each other.
In Co2FeSi, a large MCD component was observed just beside the elastic scattering at the Fe-2p3/2 absorption peak, demonstrating that it reflects the large DOS of Fe existing at the Fermi level.

Academic Significance and Societal Importance of the Research Achievements

理論的には多くの物質がハーフメタル型電子状態を有することが予測され、スピントロニクスの分野で有用であると提案されているのに対し、その電子状態が納得のいく実験結果で検証されている例ははかった。本研究では、良質のバルク単結晶試料を育成し、軟X線共鳴非弾性X線散乱測定により、ハーフメタル型電子状態を世界で初めて実証した点で、学術的意義が非常に高い。本研究により、ハーフメタル型強磁性体の電子状態を調べるのに、放射光を用いた軟X線RIXS測定が非常に有効な手段であることが示された点は社会的意義も高い。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report

Research Products

(42 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (10 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 10 results,  Open Access: 1 results) Presentation (26 results) (of which Int'l Joint Research: 8 results,  Invited: 4 results) Book (1 results) Remarks (3 results)

  • [Int'l Joint Research] MISIS(ロシア連邦)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Indian Institute of Technology, Delhi(インド)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Effect of atomic configuration on magnetic properties and electronic state of CoVMnAl quaternary heusler alloy2020

    • Author(s)
      R.Y. Umetsu, K. Saito, K. Ono, T. Fukushima, Kuroda, T. Oguchi, and T. Ishigaki
    • Journal Title

      Journal of Alloys and Compounds

      Volume: 855

    • DOI

      10.1016/j.jallcom.2020.157389

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Visualizing Half-Metallic Bulk Band Structure with Multiple Weyl Cones of the Heusler Ferromagnet2020

    • Author(s)
      T. Kono, M. Kakoki, T. Yoshikawa, X. Wang, K. Goto, T. Muro, R.Y. Umetsu, and A. Kimura
    • Journal Title

      Physical Review Letters

      Volume: 125 Pages: 216403-216409

    • DOI

      10.1103/physrevlett.125.216403

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Atomic ordering, magnetic properties, and electronic structure of Mn2CoGa Heusler alloy2019

    • Author(s)
      R.Y. Umetsu, M. Tsujikawa, K. Saito, K. Ono, T. Ishigaki, R. Kainuma, and M. Shirai
    • Journal Title

      J. Phys. Condensed Matter

      Volume: 83 Pages: 065801-065801

    • DOI

      10.1088/1361-648x/aaf54a

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Half-metallicity of the ferrimagnet Mn2VAl revealed by resonant inelastic soft x-ray scattering in a magnetic field2019

    • Author(s)
      Umetsu R.Y.、Fujiwara H.、Nagai K.、Nakatani Y.、Kawada M.、Sekiyama A.、Kuroda F.、Fujii H.、Oguchi T.、Harada Y.、Miyawaki J.、Suga S.
    • Journal Title

      Phys. Rev. B

      Volume: 99 Pages: 134414-134414

    • DOI

      10.1103/physrevb.99.134414

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Transport properties of ferrimagnetic Mn2CoSn Heusler alloy2019

    • Author(s)
      M. Seredina, I. Gavrikova, D. Karpenkova, M. Zheleznya, A. Bazlova, R. Chatterjee, R.Y. Umetsu, and V. Khovaylo
    • Journal Title

      J. Magn. Magn. Mater.

      Volume: 485 Pages: 193-196

    • DOI

      10.1016/j.jmmm.2019.02.091

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Investigation of the Itinerant Electron Ferromagnetism of Ni2+xMnGa1-x and Co2VGa Heusler Alloys2019

    • Author(s)
      T.Sakon, Y.Hayashi, A.Fukuya, D. Li, F.Honda, R. Y. Umetsu, X. Xu, G.Oomi, T.Kanomata, T.Eto
    • Journal Title

      Materials

      Volume: 12 Pages: 1-12

    • DOI

      10.3390/ma12040575

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Electrical Transport Properties of Nb and Ga Double Substituted Fe2VAl Heusler Compounds2019

    • Author(s)
      A. I. Voronina, I. A. Serhiienko, Ye. Zh. Ashim , V. L. Kurichenko, A.P. Novitskii, T. M. Inerbaev, R. Umetsu, and V.V. Khovaylo
    • Journal Title

      Semiconductors

      Volume: 53 Pages: 1856-1859

    • DOI

      10.1134/s1063782619130207

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electronic structure and magnetic properties of the half-metallic ferrimagnet Mn2VAl probed by soft x-ray spectroscopies2018

    • Author(s)
      Nagai K.、Fujiwara H.、Aratani H.、Fujioka S.、Yomosa H.、Nakatani Y.、Kiss T.、Sekiyama A.、Kuroda F.、Fujii H.、Oguchi T.、Tanaka A.、Miyawaki J.、Harada Y.、Takeda Y.、Saitoh Y.、Suga S.、Umetsu R. Y.
    • Journal Title

      Phys. Rev. B

      Volume: 97 Pages: 035143-035143

    • DOI

      10.1103/physrevb.97.035143

    • NAID

      120006731610

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pressure effect on the magnetic properties of the half-metallic Heusler alloy Co2TiSn2018

    • Author(s)
      Shigeta Iduru、Fujimoto Yutaro、Ooka Ryutaro、Nishisako Yuya、Tsujikawa Masahito、Umetsu Rie Y.、Nomura Akiko、Yubuta Kunio、Miura Yoshio、Kanomata Takeshi、Shirai Masafumi、Gouchi Jun、Uwatoko Yoshiya、Hiroi Masahiko
    • Journal Title

      Phys. Rev. B

      Volume: 97 Pages: 104414-104414

    • DOI

      10.1103/physrevb.97.104414

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Temperature dependence of differential conductance in Co-based Heusler alloy Co2TiSn and superconductor Pb junctions2018

    • Author(s)
      Ryutaro Ooka, Iduru Shigeta, Rie Y. Umetsu, Akiko Nomura, Kunio Yubuta, Touru Yamauchi, Takeshi Kanomata, Masahiko Hiroi
    • Journal Title

      Physica B

      Volume: 536 Pages: 289-289

    • DOI

      10.1016/j.physb.2017.10.055

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] 直線偏光制御硬X線光電子分光によるホイスラー合金の価電子帯電子構造研究2021

    • Author(s)
      西本幸平, 藤原秀紀, 濵本諭, 有長祐人, 姫野良介, 近藤佑宥, 木須孝幸, 中川広野, 山崎篤志, 中田惟奈, 今田真, 東谷篤志, 玉作賢治, 矢橋牧名, 石川哲也, 菅滋正, 梅津理恵, 関山明
    • Organizer
      第34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
      2020 Annual Research Report
  • [Presentation] 軟X線ARPESによるCo2MnGeのハーフメタル電子状態とワイル交差の直接観測2021

    • Author(s)
      河野嵩, 鹿子木雅明, 吉川智己, Xiaoxiao Wang, 後藤一希, 室隆桂之, 梅津理恵, 木村昭夫
    • Organizer
      第34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
      2020 Annual Research Report
  • [Presentation] 磁場中共鳴非弾性軟X線散乱及び直線偏光制御硬X線光電子分光によるホイスラー合金Co2FeSiの価電子帯電子構造2020

    • Author(s)
      西本幸平, 藤原秀紀, 濱本諭, 有長祐人, 近藤佑宥, 木須孝幸, 山神光平, 山添康介, 宮脇淳, 原田慈久, 山崎篤志, 今田真, 東谷篤志, 玉作賢治, 矢橋牧名, 石川哲也, 黒田文彬, 小口多美夫, 菅滋正, 梅津理恵, 関山明
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 磁場中共鳴非弾性軟X線散乱によるホイスラー合金Co2MnSiのハーフメタル型電子構造の直接観測2020

    • Author(s)
      藤原秀紀, 梅津理恵, 黒田文彬, 宮脇淳, 西本幸平, 樫内利幸, 関山明, 入澤明典, 藤井将, 小口多美夫, 原田慈久, 菅滋正
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 軟X線ARPESによるホイスラー合金のハーフメタルなバンド構造と複数のワイル交差点の観測2020

    • Author(s)
      河野嵩, 鹿子木将明, 吉川智己, Xiaoxiao Wang, 後藤一希, 室隆桂之, 梅津理恵, 木村昭夫
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ワイル半金属候補物質-Co基ホイスラー合金-の電子運動量分布と格子欠陥2020

    • Author(s)
      河裾厚男、前川雅樹、宮下敦巳、梅津理恵
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ホイスラー合金の磁場中共鳴非弾性X線散乱による電子状態観測2020

    • Author(s)
      梅津理恵、藤原秀紀、関山 明、黒田文彬、藤井 将、小口多美夫、菅 滋正、宮脇 淳、原田慈久
    • Organizer
      文部科学省6 大学連携プロジェクト、学際・国際的高度人材育成ライフイノベーションマテリアル創製共同研究プロジェクト、第5回 公開討論会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 磁場中共鳴非弾性X 線散乱によるホイスラー合金Co2FeSi のスピン偏極電子構造2020

    • Author(s)
      西本幸平, 藤原秀紀, 有長祐人, 山神光平, 山添康介, 宮脇淳, 原田慈久, 黒田文彬, 小口多美夫, 木須孝幸, 関山明, 菅滋正, 梅津理恵
    • 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] ハーフメタル型電子状態を有するホイスラー合金の共鳴非弾性X線散乱測定2020

    • Author(s)
      梅津理恵、藤原秀紀、関山明、黒田文彬、藤井将、小口多美夫、菅滋正、宮脇淳、原田慈久
    • Organizer
      「学際・国際的高度人材育成ライフイノベーションマテリアル創製共同研究プロジェクト」(6大学連携プロジェクト)第4回公開討論会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 直線偏光制御硬X線光電子分光によるハーフメタル型ホイスラー合金Mn2VAlの価電子帯電子構造研究2020

    • Author(s)
      西本幸平, 藤原秀紀, 濱本諭, 有長祐人, 姫野良介, 近藤佑宥, 木須孝幸, 中川広野, 山崎篤志, 中田惟奈, 今田真, 東谷篤志, 玉作賢治, 矢橋牧名, 石川哲也, 菅滋正, 梅津理恵, 関山明
    • Organizer
      日本物理学会 第75回年次大会(2020年)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 軟X線ARPESによるホイスラー型Co2MnGeのハーフメタリックなバンド構造の観測2020

    • Author(s)
      河野嵩,鹿子木将明,吉川智己,Xiaoxiao Wang,後藤一希,室隆桂之,梅津理恵,木村昭夫
    • Organizer
      日本物理学会 第75回年次大会(2020年)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 摂動下での軟X線領域の共鳴非弾性散乱の展望:V, Cr酸化物やHeusler合金など2020

    • Author(s)
      菅滋正, 藤原秀紀, 梅津理恵, 黒田文彬, 小口多美夫, 関山明, 原田慈久, 宮脇淳
    • Organizer
      日本物理学会 第75回年次大会(2020年)
    • Related Report
      2019 Annual Research Report
  • [Presentation] ホイスラー合金 Ni2Mn1-xVxGa の輸送および磁気特性2020

    • Author(s)
      江藤徹二郎、梅津理恵
    • Organizer
      日本金属学会2020年春期第166回講演大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 共鳴非弾性X線散乱によるCo2MnSiホイスラー合金の電子状態2020

    • Author(s)
      梅津理恵、藤原秀紀、黒田文彬、川田萌樹、樫内利幸、藤井 将、入澤明典、宮脇 淳、関山 明、小口多美夫、原田慈久、菅 滋正
    • Organizer
      日本金属学会2020年春期第166回講演大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Magnetic properties and electronic state of functional materials in Heusler alloys2020

    • Author(s)
      Rie Y. Umetsu
    • Organizer
      The international workshop for synergetic collaboration between material and synchrotron science through IMR-MAX IV joint research (IMR+MAX IV 2020), Sendai, Japan
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 機能性材料ホイスラー合金の電子状態(猿橋賞受賞記念講演:基調講演)2019

    • Author(s)
      梅津理恵
    • Organizer
      日本金属学会2019年秋期(第165回)講演大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 直線偏光制御硬X線光電子分光によるハーフメタル型ホイスラー合金Co2MnSiの電子構造研究2019

    • Author(s)
      西本幸平、藤原秀紀、中田惟奈、濱本諭、久我健太郎、木須孝幸、門野利治、今田真、東谷篤志、山崎篤志、玉作賢治、矢橋牧名、石川哲也、菅滋正、梅津理恵、関山明
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Mn基ホイスラー合金Mn2CoGaの磁気的性質と原子配列2019

    • Author(s)
      梅津理恵、斉藤耕太郎、小野寛太、石垣徹、辻川雅人、白井正文
    • Organizer
      日本磁気学会第43回学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Electronic state and phase stability of half-metallic ferromagnets in Heusler alloys2019

    • Author(s)
      R.Y. Umetsu
    • Organizer
      KIST-KINKEN Joint Symposium 2019, KIST, Soul, Korea,
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Resonant inelastic soft x-ray scattering under magnetic field for Mn2VAl Heusler alloy2019

    • Author(s)
      R.Y. Umetsu, H. Fujiwara, F. Kuroda, H. Fujii, T. Oguchi, A. Sekiyama, J. Miyawaki, Y. Harada and S. Suga
    • Organizer
      64th Annual Conference on Magnetism and Magnetic Materials, Las Vegas, Nevada, USA
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Magnetic properties of the L21-ordered phase in Co-based Heusler alloys Co2TiGa and Co2TiSn2019

    • Author(s)
      I. Shigeta, H. Fundo, R. Ooka, R.Y. Umetsu, Y. Miura, A. Nomura, K. Yubuta, T. Yamauchi, T. Kanomata, and M. Hiroi
    • Organizer
      Joint 5th Int’l Symposium on Frontiers in Materials Science & 3rd Int’l Symposium on Nano-materials, Technology and Applications (FMS - NANOMATA 2019), Da Nang, Vietnam
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] SX-RIXS measurements under magnetic field for Heusler alloys with half-metallic electronic state2019

    • Author(s)
      R.Y. Umetsu
    • Organizer
      17th RIEC International Workshop on Spintronics and 10th JSPS Core-to-Core Workshop on "New-Concept Spintronic Devices", Sendai, Japan
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Magnetic properties and electronic structure of the half-metallic ferrimagnet Mn2VAl probed by soft-X-ray spectroscopies2019

    • Author(s)
      H. Fujiwara, K. Nagai, F. Kuroda, H. Fujii, T. Oguchi, Y. Takeda, Y. Saitoh, J. Miyawaki, Y. Harada, A. Tanaka, T. Kiss, A. Sekiyama, S. Suga, R.Y. Umetsu
    • Organizer
      The first international Workshop on Momentum Microscopy & Spectroscopy for Materials Science
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CoVMnAl合金の原子配列と電子状態2018

    • Author(s)
      梅津理恵,福島鉄也,齊藤耕太郎,小野寛太,黒田文彬,小口多美夫,石垣徹
    • Organizer
      第42回日本磁気学会学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Atomic configuration and electronic state of CoVMnAl quaternary Heusler alloy2018

    • Author(s)
      Rie Y. Umetsu, Kotaro Saito, Kanta Ono, Tetsuya Fukushima, Fumiaki Kuroda, Tamio Oguchi, and Toru Ishigaki
    • Organizer
      International Conference on Magnetism, ICM 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Resonance Inelastic X-ray Scattering under External Magnetic Field: Complementary Technique to the Spin- and Angle-resolved Photoelectron Spectroscopy2018

    • Author(s)
      Shigemasa SUGA, Hidenori FUJIWARA, Gernot GUENTHERODT, Arunaya GUPTA, Jun MIYAWAKI, Yoshihisa HARADA, and Rie UMETSU
    • Organizer
      International Workshop on Trends in Advanced Spectroscopy in Materials Science (TASPEC)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Book] Materials Science and Technology: Phase Stability, Magnetic Properties, and Martensitic Transformations in Co-based Heusler Alloys2020

    • Author(s)
      Rie Y. Umetsu, Xiao Xu, and Ryosuke Kainuma
    • Total Pages
      32
    • Publisher
      Wiely
    • ISBN
      9783527603978
    • Related Report
      2019 Annual Research Report
  • [Remarks] 東北大学金属材料研究所新素材共同研究開発センター、研究トピックス、梅津理恵

    • Related Report
      2020 Annual Research Report
  • [Remarks] 東北大学スピントロニクス学術連携研究教育センター、研究組織、スピントロニクスデバイス評価研究部門

    • URL

      http://www.csrn.tohoku.ac.jp/uploads/pdf/20200710112310_844829374.pdf

    • Related Report
      2020 Annual Research Report
  • [Remarks] 東北大学金属材料研究所・新素材共同研究開発センター・研究トピックス

    • URL

      http://www.crdam.imr.tohoku.ac.jp/research_umetsu1.pdf

    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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