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Theoretical study of highly spin-polarized current generator using ferromagnetic insulator and halfmetal

Research Project

Project/Area Number 19560013
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied materials science/Crystal engineering
Research InstitutionKansai University

Principal Investigator

ITOH Hiroyoshi  Kansai University, システム理工学部, 准教授 (00293671)

Co-Investigator(Renkei-kenkyūsha) INOUE Jun-ichiro  名古屋大学, 大学院工学研究科, 教授 (60115532)
HONDA Syuta  名古屋大学, 大学院工学研究科, PD
Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords新機能材料 / スピンエレクトロニクス / 計算物理 / 磁性 / メゾスコピック系
Research Abstract

室温で高スピン偏極電流を生成可能なデバイスの材料として, 強磁性絶縁体とハーフメタルを理論的に検討した。ダブル・ペロブスカイトLa_2NiMnO_6, スピネル・フェライトFe_2O_3, ホイスラー合金Co_2MnSiと(Fe-Mn)_3Si, バリスティック擬ハーフメタルCoFeB/MgOの電子状態をバンド計算し, スピン依存伝導特性を調べた。その結果から, これらの材料を用いることで高いスピン偏極率を持つ電流を生成可能であることが明らかとなった。

Report

(3 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • Research Products

    (20 results)

All 2009 2008 2007

All Journal Article (9 results) (of which Peer Reviewed: 9 results) Presentation (11 results)

  • [Journal Article] Ferromagnetism and Electronic Structures of Nonstoichiometric Heusler-Alloy Fe3-xMnxSi Epilayers Grown on Ge(111)2009

    • Author(s)
      K. Hamaya, H. Itoh, O. Nakatsuka, K. Ueda, K. Yamamoto, M. Itakura, T. Taniyama, T. Ono, and M. Miyao
    • Journal Title

      Physical Review Letters Vol. 102

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Ferromagnetism and Electronic structures of Nonstoichiometric Heusler-Alloy Fe_<3-x>Mn_xSi Epilayers Grown on Ge(111)2009

    • Author(s)
      K. Hamaya, et al.
    • Journal Title

      Physical Review Letters 102

      Pages: 1372041-4

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ホイスラー合金を用いた強磁性トンネル接合のTMRに対するスピン反転散乱の効果2008

    • Author(s)
      高田一朗, 井上順一郎, 伊藤博介
    • Journal Title

      Journal of Magnetic Society of Japan Vol. 32

      Pages: 338-342

    • NAID

      110006818152

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Inelastic tunneling spectra of MgO barrier magnetic tunneling junctions showing large magnon contribution2008

    • Author(s)
      Do Bang, T. Nozaki, D. D. Djayaprawira, M. Shiraishi, Y. Suzuki, A. Fukushima, H. Kubota, T. Nagahama, S. Yuasa, H. Maehara, K. Tsunekawa, Y. Nagamine, N. Watanabe, H. Itoh
    • Journal Title

      Journal of Applied Physics Vol. 105

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] pin dependent tunneling spectroscopy in single crystalline bcc-Co/ MgO/ bcc-Co (001) junctions2008

    • Author(s)
      S. Nishioka, R. Matsumoto, H. Tomita, T. Nozaki, Y. Suzuki, H. Itoh, S. Yuasa
    • Journal Title

      Applied Physics Letters Vol. 93

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Spin dependent tunneling spectroscopy in single crystallinebcc-Co/MgO/bcc-Co(001) junctions2008

    • Author(s)
      S. Nishioka, et al.
    • Journal Title

      Applied Physics Letters 93

      Pages: 1225111-3

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Inelastic tunneling spectra of MgO barrier magnetic tunneling junctions showing large magnon contribution2008

    • Author(s)
      Do Bang, et al.
    • Journal Title

      Journal of Applied Physics 105

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of spin-flip tunneling on temperature and voltage dependence of TMR2007

    • Author(s)
      I. Takada, H. Itoh, J. Inoue
    • Journal Title

      physica status solidi (b) Vol. 244

      Pages: 4452-4455

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Effects of spin-flip tunneling on temperature and voltage dependence of TMR2007

    • Author(s)
      I.Takada, J.Ozeki, H.Itoh, and J.Inoue
    • Journal Title

      physica status solidi(b) 244

      Pages: 4452-4455

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] γ-Fe2O3(マグヘマイト)の電子状態とスピン・フィルター効果2009

    • Author(s)
      伊藤博介, 本多周太, 井上順一郎, 柳原英人, 喜多英治
    • Organizer
      日本物理学会「第64回年次大会」
    • Place of Presentation
      立教学院
    • Related Report
      2008 Final Research Report
  • [Presentation] Electronic struc- ture and spin-filter effect of γ-Fe2O3 (maghemite)2009

    • Author(s)
      H. Itoh, S. Honda, J. Inoue, H. Yanagihara E. Kita
    • Organizer
      March Meeting 2009, American Physical Society
    • Place of Presentation
      Pittsburgh, USA
    • Related Report
      2008 Final Research Report
  • [Presentation] Y-Fe_2O_3 (マグヘマイト)の電子状態とスピン・フィルター効果2008

    • Author(s)
      伊藤博介ら
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教学院, 東京
    • Year and Date
      2008-03-28
    • Related Report
      2008 Annual Research Report
  • [Presentation] Electronic structure and effect of γ-Fe_2O_3 (maghemite)2008

    • Author(s)
      H. Itoh, et al.
    • Organizer
      American Physical Society March Meeting 2009
    • Place of Presentation
      Pittsburgh, USA
    • Year and Date
      2008-03-16
    • Related Report
      2008 Annual Research Report
  • [Presentation] ホイスラー合金を用いたトンネル接合のTMRに対するスピン反転散乱の効果2007

    • Author(s)
      高田 一朗, 井上 順一郎, 伊藤 博介
    • Organizer
      2007年秋季第68回応用物理学会学術講演会
    • Place of Presentation
      北海道工業大学
    • Year and Date
      2007-09-05
    • Related Report
      2007 Annual Research Report
  • [Presentation] Effects of spin-flip tunneling on temperature and voltage dependence of TMR2007

    • Author(s)
      I.Takada, J.Ozeki, H.Itoh, and J.Inoue
    • Organizer
      International Symposium on Advanced Magnetic Materials and Applications
    • Place of Presentation
      Jeju island(Korea)
    • Year and Date
      2007-05-30
    • Related Report
      2007 Annual Research Report
  • [Presentation] Electronic structure and spin-filter effect of spinel ferrites2007

    • Author(s)
      J.Ozeki, K.Ito, H.Itoh, and J.Inoue
    • Organizer
      International Symposium on Advanced Magnetic Materials and Applications
    • Place of Presentation
      Jeju island(Korea)
    • Year and Date
      2007-05-29
    • Related Report
      2007 Annual Research Report
  • [Presentation] ホイスラー合金を用いた強磁性トンネル接合のTMRに対するスピン反転散乱の効果2007

    • Author(s)
      高田一朗, 井上順一郎, 伊藤博介
    • Organizer
      第31回日本応用磁気学会学術講演会
    • Place of Presentation
      学習院大学
    • Related Report
      2008 Final Research Report 2007 Annual Research Report
  • [Presentation] ホイスラー合金を用いたトンネル接合のTMRに対するスピン反転散乱の効果2007

    • Author(s)
      高田一朗, 井上順一郎, 伊藤博介
    • Organizer
      2007年秋季 第68回応用物理学会学術講演会
    • Place of Presentation
      北海道工業大学
    • Related Report
      2008 Final Research Report
  • [Presentation] Effects of spin-flip tunneling on temperature and voltage dependence of TMR2007

    • Author(s)
      I. Takada, H. Itoh, J. Inoue
    • Organizer
      International Symposium on Advanced Magnetic Materials and Applications
    • Place of Presentation
      Jeju island, Korea
    • Related Report
      2008 Final Research Report
  • [Presentation] Electronic structure and spin-filter effect of spinel ferrites2007

    • Author(s)
      J. Ozeki, K. Ito, H. Itoh, and J. Inoue
    • Organizer
      International Symposium on Advanced Magnetic Materials and Applications
    • Place of Presentation
      Jeju island, Korea
    • Related Report
      2008 Final Research Report

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Published: 2007-04-01   Modified: 2016-04-21  

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