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Study of the functionally and fabrication of the ultrathin films on single crystalline ferromagnetic semiconductor

Research Project

Project/Area Number 21840057
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Condensed matter physics I
Research InstitutionInstitute for Molecular Science

Principal Investigator

MIYAZAKI Hidetoshi  Institute for Molecular Science, 極端紫外光研究施設, 特別協力研究員 (10548960)

Project Period (FY) 2009 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥2,704,000 (Direct Cost: ¥2,080,000、Indirect Cost: ¥624,000)
Fiscal Year 2010: ¥1,287,000 (Direct Cost: ¥990,000、Indirect Cost: ¥297,000)
Fiscal Year 2009: ¥1,417,000 (Direct Cost: ¥1,090,000、Indirect Cost: ¥327,000)
KeywordsEuO / 強磁性半導体 / 単結晶 / 超薄膜
Research Abstract

EuO is a ferromagnetic semiconductor with the Curie temperature (TC) of about 70 K. To use EuO for spintronics devices such as spin filter tunnel barriers, it is important to clarify the physical properties as well as the electronic structure and magnetic structure of EuO ultrathin films with a few nanometer-thicknesses. Recently, we succeeded to fabricate single-crystalline EuO ultrathin films by a molecular beam epitaxy method. We clearly observed dispersion curves of the Eu 4f and O 2p states at around the X point at 10 K (ferromagnetic phase). However the energy width of the dispersion curves of the Eu 4f state becomes smaller than that of bulk materials. This result indicates that the hybridization intensity between the Eu 4f and other states becomes weaker with decreasing thickness.

Report

(3 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • Research Products

    (23 results)

All 2011 2010 2009 Other

All Journal Article (8 results) (of which Peer Reviewed: 7 results) Presentation (13 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Electronic-Structure-Driven Magnetic Ordering in a Kondo Semiconductor CeOs_2Al_<10>2011

    • Author(s)
      S.Kimura, T.Iizuka, H.Miyazaki, A.Irizawa, Y.Muro, T.Takabatake
    • Journal Title

      Physical Review Letters 106

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] La-doped EuO : A Rare Earth Ferromagnetic Semiconductor with the Highest Curie Temperature2010

    • Author(s)
      H.Miyazaki, T.Ito, H.J.Im, K.Terashima, S.Yagi, M.Kato, K.Soda, S.Kimura
    • Journal Title

      Applied Physics Letters 96

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Change of lattice constant due to hybridization effect of a ferromagnetic semiconductor2010

    • Author(s)
      H.Miyazaki, T.Ito, H.J.Im, K.Terashima, T.Iizuka, S.Yagi, M.Kato, K.Soda, S.Kimura
    • Journal Title

      Journal of Physics : Conference Series 200

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Anomalous transport in an n-type topological insulator ultrathin Bi_2Se_3 film2010

    • Author(s)
      T.Hirahara, Y.Sakamoto, T.Fujii, Y.Takeuchi, H.Miyazaki, S.Kimura, I.Matsuda, A.Kakizaki, S.Hasegawa
    • Journal Title

      Physical Review B, American Physical Society 82

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Spectroscopic evidence of a topological quantum phase transition in ultrathin Bi_2Se_3 films2010

    • Author(s)
      Y.Sakamoto, T.Hirahara, H.Miyazaki, S.Kimura, S.Hasegawa
    • Journal Title

      Physical Review B 81

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] La-doped EuO : A rare earth ferromagnetic semiconductor with the highest Curie temperature2010

    • Author(s)
      H.Miyazaki
    • Journal Title

      Applied Physics Letters

      Volume: 96

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Change of lattice constant due to hybridization effect of a ferromagnetic semiconductor EuO2010

    • Author(s)
      宮崎秀俊
    • Journal Title

      Journal of Physics : Conference Series 200

      Pages: 0121241-4

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 希土類酸化物薄膜の将来展望2010

    • Author(s)
      宮崎秀俊
    • Journal Title

      機能材料 35

      Pages: 55-61

    • Related Report
      2009 Annual Research Report
  • [Presentation] 強磁性半導体EuO超薄膜における3次元角度分解光電子分光2011

    • Author(s)
      宮崎秀俊
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学(新潟県)
    • Year and Date
      2011-03-28
    • Related Report
      2010 Annual Research Report
  • [Presentation] 3次元角度分解光電子分光によるEuO超薄膜の電子構造2011

    • Author(s)
      宮崎秀俊,羽尻哲也,松波雅治,伊藤孝寛,木村真一
    • Organizer
      2011年第24回日本放射光学会年会放射光科学合同シンポジウム
    • Place of Presentation
      つくば国際会議場
    • Year and Date
      2011-01-10
    • Related Report
      2010 Final Research Report
  • [Presentation] 3次元角度分解光電子分光によるEuO超薄膜の電子状態2011

    • Author(s)
      宮崎秀俊
    • Organizer
      第24回日本放射光学会年会放射光科学合同シンポジウム
    • Place of Presentation
      つくば国際会議場(茨城県)
    • Year and Date
      2011-01-10
    • Related Report
      2010 Annual Research Report
  • [Presentation] 強磁性半導体電子ドープEuO薄膜の内殻磁気円二色性測定2010

    • Author(s)
      宮崎秀俊
    • Organizer
      2009年第64回年次大会物理学会
    • Place of Presentation
      岡山大学(岡山県)
    • Year and Date
      2010-03-21
    • Related Report
      2009 Annual Research Report
  • [Presentation] 内殻磁気円二色性測定による電子ドープEuOの電子状態2010

    • Author(s)
      宮崎秀俊
    • Organizer
      第23回日本放射光学会放射光科学合同シンポジウム
    • Place of Presentation
      イーグレひめじ(兵庫県)
    • Year and Date
      2010-01-09
    • Related Report
      2009 Annual Research Report
  • [Presentation] 酸化ユーロピウム単結晶薄膜の角度分解光電子分光2009

    • Author(s)
      宮崎秀俊
    • Organizer
      新学術領域研究「重い電子の形成と秩序」ワークショップ
    • Place of Presentation
      岡山大学(岡山県)
    • Year and Date
      2009-12-25
    • Related Report
      2009 Annual Research Report
  • [Presentation] EuO薄膜の強磁性相転移と電子状態2009

    • Author(s)
      宮崎秀俊
    • Organizer
      平成21年UVSORユーザーズミーティング
    • Place of Presentation
      岡崎コンファレンスセンター(愛知県)
    • Year and Date
      2009-11-14
    • Related Report
      2009 Annual Research Report
  • [Presentation] Direct observation of momentum-dependent exchange interaction in a Heisenberg ferromagnet EuO2009

    • Author(s)
      宮崎秀俊
    • Organizer
      11^<th> international conference on electronic spectroscopy and structure
    • Place of Presentation
      Nara, Japan(奈良県)
    • Year and Date
      2009-10-07
    • Related Report
      2009 Annual Research Report
  • [Presentation] Temperature dependent angle-resolved photoemission spectroscopy on ferromagnetic EuO thin films2009

    • Author(s)
      宮崎秀俊
    • Organizer
      11^<th> international conference on electronic spectroscopy and structure
    • Place of Presentation
      Nara, Japan(奈良県)
    • Year and Date
      2009-10-07
    • Related Report
      2009 Annual Research Report
  • [Presentation] Temperature dependent angle-resolved photoemission spectroscopy on ferromagnetic EuO thin films2009

    • Author(s)
      宮崎秀俊,羽尻哲也,松波雅治,伊藤孝寛,木村真一
    • Organizer
      2^<nd> UVSOR Workshop on Low-Energy Photoemission of Solids using Synchrotron Radiation
    • Place of Presentation
      岡崎コンファレンスセンター
    • Year and Date
      2009-10-03
    • Related Report
      2010 Final Research Report
  • [Presentation] 内殻磁気円二色性による強磁性半導体EuO単結晶薄膜の電子状態2009

    • Author(s)
      宮崎秀俊
    • Organizer
      2009年秋季日本物理学会
    • Place of Presentation
      熊本大学(熊本県)
    • Year and Date
      2009-09-25
    • Related Report
      2009 Annual Research Report
  • [Presentation] Possible origin of Electron-doping induced increase of Curie temperature on EuO2009

    • Author(s)
      宮崎秀俊,羽尻哲也,松波雅治,伊藤孝寛,木村真一
    • Organizer
      International Conference on Magnetism 2009
    • Place of Presentation
      Karlsruhe, Germany
    • Year and Date
      2009-07-29
    • Related Report
      2010 Final Research Report
  • [Presentation] Possible origin of electron-doping induced increase of T_C on EuO2009

    • Author(s)
      宮崎秀俊
    • Organizer
      International conference on magnetism
    • Place of Presentation
      Karlsruhe, Germany
    • Year and Date
      2009-07-29
    • Related Report
      2009 Annual Research Report
  • [Book] 希土類酸化物薄膜の将来展望(30(1))2010

    • Author(s)
      宮崎秀俊,木村真一
    • Publisher
      機能材料
    • Related Report
      2010 Final Research Report
  • [Remarks] ホームページ等

    • URL

      http://www.uvsor.ims.ac.jp/staff/skimura/indexj.htm

    • Related Report
      2010 Final Research Report

URL: 

Published: 2009-04-01   Modified: 2020-05-15  

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