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Development of the methods for designing spintronics devices and analyzing spin-polarized current

Research Project

Project/Area Number 17064001
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionTohoku University

Principal Investigator

ABE Kazutaka  Tohoku University, 電気通信研究所, 助教 (00361197)

Co-Investigator(Kenkyū-buntansha) 三浦 良雄  東北大学, 電気通信研究所, 助教 (10361198)
白井 正文  東北大学, 電気通信研究所, 教授 (70221306)
佐久間 昭正  東北大学, 大学院・工学研究科, 教授 (30361124)
Co-Investigator(Renkei-kenkyūsha) MIURA Yoshio  東北大学, 電気通信研究所, 助教 (10361198)
SHIRAI Masafumi  東北大学, 電気通信研究所, 教授 (70221306)
SAKUMA Akimasa  東北大学, 大学院工学研究科, 教授 (30361124)
Project Period (FY) 2005 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥28,100,000 (Direct Cost: ¥28,100,000)
Fiscal Year 2008: ¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 2007: ¥7,600,000 (Direct Cost: ¥7,600,000)
Fiscal Year 2006: ¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 2005: ¥7,400,000 (Direct Cost: ¥7,400,000)
Keywords第一原理計算 / スピントロニクス / 輸送 / 磁性 / 表面・界面 / 輸送特性
Research Abstract

界面でのハーフメタル性(フェルミエネルギーでのスピン偏極率が100%の性質)は、他物質へのスピン偏極電流注入が鍵となるスピントロニクスにおいて、理想的な特徴である。本研究では、金属/半導体、金属/酸化物界面でハーフメタル性を維持する系を提案した。一方、MRAM等に利用される磁気トンネル接合の第一原理伝導計算も実行し、高いトンネル磁気抵抗比をもつ候補を幾つか提案している

Report

(5 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (48 results)

All 2009 2008 2007 2006 Other

All Journal Article (20 results) (of which Peer Reviewed: 17 results) Presentation (27 results) Book (1 results)

  • [Journal Article] Half-metallic interface between a Heusler alloy and Si2009

    • Author(s)
      K. Abe, Y. Miura, Y. Shiozawa, and M. Shirai
    • Journal Title

      J. Phys.: Condens, (Matter 21) 064244

      Pages: 1-5

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] The effect of the interface oxidation on tunneling conductance of Co2MnSi/MgO/Co2MnSi magnetic tunnel junction2009

    • Author(s)
      Y. Miura, K. Abe, and M. Shirai
    • Journal Title

      J. Phys.: Condens, (Matter 21) 064245

      Pages: 1-6

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Half-metallic interface between a Heusler alloy and Si2009

    • Author(s)
      Kazutaka Abe
    • Journal Title

      Journal of Physics : Condensed Matter 21

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The effect of the interface oxidation on tunneling conductance of Co_2MnSi/MgO/Co_2MnSi magnetic tunnel junction2009

    • Author(s)
      Yoshio Miura
    • Journal Title

      Journal of Physics : Condensed Matter 21

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 高スピン偏極率を有するホイスラー合金/MgO界面の理論設計2009

    • Author(s)
      三浦良雄
    • Journal Title

      Journal of the Magnetics Society of Japan 33

      Pages: 105-109

    • NAID

      110007115228

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical studies on spin- dependent conductance in FePt/MgO/FePt (001) magnetic tunnel junctions2008

    • Author(s)
      Y. Taniguchi, Y. Miura, K. Abe, and M. Shirai
    • Journal Title

      IEEE Trans Magn. 44

      Pages: 2585-2588

    • NAID

      120002338666

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Half-metallic interface and coherent tunneling in Co2YZ/MgO/Co2YZ (YZ=MnSi,CrAl) magnetic tunnel junctions : A first-principles study2008

    • Author(s)
      Y. Miura, H. Uchida, Y. Oba, K. Abe, and M. Shirai
    • Journal Title

      Phys. Rev B 78, 064416

      Pages: 1-9

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Monatomic Au wire with a magnetic Ni impurity: Electronic structure and ballistic conductance2008

    • Author(s)
      Y. Miura, R. Mazzarello, A. Dal Corso, A. Smogunov, and E. Tosatti
    • Journal Title

      Phys. Rev B 78, 205412

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Half-metallic interface and coherent tunneling in Co_2YZ/MgO/Co_2YZ (YZ=MnSi, CrAl)magnetic tunnel junctions : A first-principles study2008

    • Author(s)
      Yoshio Miura
    • Journal Title

      Physical Review B 78

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical studies on spin-dependent conductance in FePt/MgO/FePt (001)magnetic tunnel iunctions2008

    • Author(s)
      Yujiro Taniguchi
    • Journal Title

      IEEE Transactions on Magnetics 44

      Pages: 2585-2588

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Monatomic Au wire with a magnetic Ni impurity : Electronic structure and ballistic conductance2008

    • Author(s)
      Yoshio Miura
    • Journal Title

      Physical Review B 78

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Coherent tunnelling conduc- tance in magnetic tunnel junctions of half-metallic full Heusler alloys with MgO barriers2007

    • Author(s)
      Y. Miura, H. Uchida, Y. Oba, K. Nagao, and M. Shirai
    • Journal Title

      J. Phys. : Condens Matter 19, 365228

      Pages: 1-7

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] The computational materials design of (Ga, Cr)N : effects of co-doping on exchange interactions2007

    • Author(s)
      T. Nakano, M. Shirai, Y. Miura and K. Nagao
    • Journal Title

      J. Phys.: Condens Matter 19, 365238

      Pages: 1-6

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Coherent tunneling conductance in magnetic tunnel junctions of half-metallic full Heusler alloys with MgO barrier2007

    • Author(s)
      Yoshio Miura, Hirohisa Uchida, Yoshihiro Oba, Kazutaka Nagao and Masafumi Shirai
    • Journal Title

      Journal of Physics: Condensed Matter 19

      Pages: 365228-365235

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The computational materials design of (Ga, Cr) N: effects of co-doping on exchange interactions2007

    • Author(s)
      Tatsuya Nakano, Masafumi Shirai, Yoshio Miura and Kazutaka Nagao
    • Journal Title

      Journal of Physics: Condensed Matter 19

      Pages: 365238-365244

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Coherent tunnelling conductance in magnetic tunnel junctions of half-metallic full Heusler alloys with MgO barriers2007

    • Author(s)
      Y.Miura, H.Uchida, Y.Oba, K.Nagao, M.Shirai
    • Journal Title

      J. Phys. : Condens. Matter 19巻(in press)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Half- metallicity at the (110) interface between a full Heusler alloy and GaAs2006

    • Author(s)
      K. Nagao, Y. Miura, and M. Shirai
    • Journal Title

      Phys. Rev B 73, 104447

      Pages: 1-7

    • NAID

      120001182177

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Ab initio study on stability of half-metallic Co-based full-Heusler alloys2006

    • Author(s)
      Y. Miura, M. Shirai, and K. Nagao
    • Journal Title

      J. Appl. Phys 99, 08J112

      Pages: 1-3

    • NAID

      120001182174

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Half metallicity at Half-metallicity at the (110) interface between a full Heusler alloy and GaAs2006

    • Author(s)
      K.Nagao, Y.Miura, M.Shirai
    • Journal Title

      Phys. Rev. B. B73(in press)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Ab initio study on stabilities of half-metallic Co-based full-Heusler alloys2006

    • Author(s)
      Y.Miura, M.Shirai, K.Nagao
    • Journal Title

      J. Appl. Phys. (accepted)

    • NAID

      120001182174

    • Related Report
      2005 Annual Research Report
  • [Presentation] Computational design of half-metallic ferromagnets2009

    • Author(s)
      Masafumi Shirai
    • Organizer
      York University-Tohoku University Joint Seminar
    • Place of Presentation
      Sendai (Japan)
    • Year and Date
      2009-01-19
    • Related Report
      2008 Annual Research Report
  • [Presentation] スピントロニクス材料の理論設計 : ハーフメタルの将来展望2009

    • Author(s)
      白井正文
    • Organizer
      日本金属学会第3分科会シンポジウム
    • Place of Presentation
      東北大学(仙台市)
    • Year and Date
      2009-01-06
    • Related Report
      2008 Annual Research Report
  • [Presentation] Theoretical design of highly spin-polarized interfaces between a half-metallic Heusler alloys and semiconductors2008

    • Author(s)
      M. Shirai
    • Organizer
      MRS Fall Meeting 2008, Symposium L
    • Place of Presentation
      Boston (USA)
    • Year and Date
      2008-12-03
    • Related Report
      2008 Annual Research Report 2008 Final Research Report
  • [Presentation] Half-metallic ferromagnets : The status quo and outlook2008

    • Author(s)
      Masafumi Shirai
    • Organizer
      Hitachi Spintronics Workshop
    • Place of Presentation
      Kokubunji (Japan)
    • Year and Date
      2008-11-20
    • Related Report
      2008 Annual Research Report
  • [Presentation] High spin polarization at Heusler-alloy/silicon interface2008

    • Author(s)
      K. Abe
    • Organizer
      53rd Annual Conference on Magnetism and Magnetic Materials
    • Place of Presentation
      Austin (USA)
    • Year and Date
      2008-11-11
    • Related Report
      2008 Final Research Report
  • [Presentation] IHigh spin polarization at Heusler-alloy/silicon interface2008

    • Author(s)
      Kazutaka Abe
    • Organizer
      53rd Annual Conference on Magnetism and Magnetic Materials
    • Place of Presentation
      Austin (USA)
    • Year and Date
      2008-11-11
    • Related Report
      2008 Annual Research Report
  • [Presentation] Half-metallic behavior of Co_2MnSi/Co_2CrAl/MgO junction and its coherent tunneling conductance : A first-principles study2008

    • Author(s)
      Yoshio Miura
    • Organizer
      53rd Annual Conference on Magnetism and Magnetic Matetials
    • Place of Presentation
      Austin (USA)
    • Year and Date
      2008-11-11
    • Related Report
      2008 Annual Research Report
  • [Presentation] Theoretical design of highly spin-polarized interfaces between half-metals and non-magnetic materials2008

    • Author(s)
      Masafumi Shirai
    • Organizer
      23rd Nishinomiya-Yukawa Memorial International Workshop on Spin Transport in Condensed Matter
    • Place of Presentation
      Kyoto (Japan)
    • Year and Date
      2008-10-31
    • Related Report
      2008 Annual Research Report
  • [Presentation] Computational design of highly spin-polarized ferromagnet/semiconductor interfaces2008

    • Author(s)
      Masafumi Shirai
    • Organizer
      CNSI-RIEC Workshop on Nanoelectronics, Spintronics and Photonics
    • Place of Presentation
      Santa Barbara (USA)
    • Year and Date
      2008-10-09
    • Related Report
      2008 Annual Research Report
  • [Presentation] Theoretical studies on magnetic tunnel junctions using perpendicular magnetic FePt electrodes2008

    • Author(s)
      Mitsuru Suzuki
    • Organizer
      CNSI-RIEC Workshop on Nanoelectronics, Spintronics and Photonics
    • Place of Presentation
      Santa Barbara (USA)
    • Year and Date
      2008-10-09
    • Related Report
      2008 Annual Research Report
  • [Presentation] 高スピン偏極率を有するホイスラー合金/MgO界面の理論設計2008

    • Author(s)
      三浦良雄
    • Organizer
      第32回日本磁気学会学術講演会
    • Place of Presentation
      東北学院大学(多賀城市)
    • Year and Date
      2008-09-13
    • Related Report
      2008 Annual Research Report
  • [Presentation] The electronic structure of half-metallic ferromagnet/semiconductor junctions2008

    • Author(s)
      白井正文
    • Organizer
      第32回日本磁気学会学術講演会
    • Place of Presentation
      東北学院大学(多賀城市)
    • Year and Date
      2008-09-12
    • Related Report
      2008 Annual Research Report
  • [Presentation] 高スピン偏極界面Co_2MnSi/Co_2CrAl/MgOにおけるトンネル伝導の第一原理計算2008

    • Author(s)
      三浦良雄
    • Organizer
      2008年秋季第69回応用物理学会学術講演会
    • Place of Presentation
      中部大学(春日井市)
    • Year and Date
      2008-09-04
    • Related Report
      2008 Annual Research Report
  • [Presentation] 高スピン偏極ホイスラー合金からシリコンへのスピン注入の理論2008

    • Author(s)
      白井正文
    • Organizer
      2008年秋季第69回応用物理学会学術講演会
    • Place of Presentation
      中部大学(春日井市)
    • Year and Date
      2008-09-03
    • Related Report
      2008 Annual Research Report
  • [Presentation] Highly spin-polarized interfaces between a half-metallic Heusler alloy and silicon2008

    • Author(s)
      Kasutaka Abe
    • Organizer
      21st Congress and General Assembly of the International Union of Crystallography
    • Place of Presentation
      Osaka (Japan)
    • Year and Date
      2008-08-26
    • Related Report
      2008 Annual Research Report
  • [Presentation] Effect of the interface oxidation on tunneling conductance of Co_2YZ/MgO/Co_2YZ sandwiches2008

    • Author(s)
      Miura Yoshio
    • Organizer
      International Conference on Quantum Simulators and Design 2008
    • Place of Presentation
      Tokyo (Japan)
    • Year and Date
      2008-06-02
    • Related Report
      2008 Annual Research Report
  • [Presentation] Computational design of magnetoresistive tunnel junctions with perpendicular magnetic anisotropy2008

    • Author(s)
      Masafumi Shirai
    • Organizer
      International Conference on Quantum Simulators and Design 2008
    • Place of Presentation
      Tokyo (Japan)
    • Year and Date
      2008-06-02
    • Related Report
      2008 Annual Research Report
  • [Presentation] Half-metallic interface between a Heusler alloy and Si2008

    • Author(s)
      Kazutaka Abe
    • Organizer
      International Conference on Quantum Simulators and Design 2008
    • Place of Presentation
      Tokyo (Japan)
    • Year and Date
      2008-06-01
    • Related Report
      2008 Annual Research Report
  • [Presentation] Theoretical studies on spin-dependent conductance in FePt/MgO/FePt(001) magnetic tunnel junctions2008

    • Author(s)
      M. Shirai
    • Organizer
      IEEE International Magnetics Conference 2008
    • Place of Presentation
      Madrid (Spain)
    • Year and Date
      2008-05-05
    • Related Report
      2008 Final Research Report
  • [Presentation] Theoretical studies on spin-dependent conductance in FePt/MgO/FePt(001)magnetic tunnel junctions2008

    • Author(s)
      Masafumi Shirai
    • Organizer
      IEEE International Magnetics Conference 2008
    • Place of Presentation
      Madrid (Spain)
    • Year and Date
      2008-05-05
    • Related Report
      2008 Annual Research Report
  • [Presentation] Co2FeSi/Siヘテロ接合系の電子状態2008

    • Author(s)
      三浦 良雄
    • Organizer
      第55回応用物理学会連合講演会
    • Place of Presentation
      日本大学理工学部船橋キャンパス
    • Year and Date
      2008-03-28
    • Related Report
      2007 Annual Research Report
  • [Presentation] Ab initio study on interface oxidation of Co2MnSi/MgO/Co2MnSi magnetic tunnel junction2007

    • Author(s)
      Yoshio Miura
    • Organizer
      52^<nd> ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS
    • Place of Presentation
      フロリダ州 タンパ マリオットウォーターサイドホテル
    • Year and Date
      2007-11-06
    • Related Report
      2007 Annual Research Report
  • [Presentation] ハーフメタル/絶縁体ヘテロ構造における磁気抵抗の第一原理計算2007

    • Author(s)
      阿部 和多加
    • Organizer
      日本物理学会 第62回年次大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2007-09-22
    • Related Report
      2007 Annual Research Report
  • [Presentation] Co_2YZ/MgO/Co_2YZ磁気トンネル接合の界面酸化に関する理論研究2007

    • Author(s)
      三浦 良雄
    • Organizer
      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] A first-principles study on transport properties in magnetic tunnel junctions of Co-based full-Heusler alloys with MgO barrier2007

    • Author(s)
      Y. Miura
    • Organizer
      Frontiers in Computational Science of Nanoscale Transport
    • Place of Presentation
      Tokyo (Japan)
    • Year and Date
      2007-06-08
    • Related Report
      2008 Final Research Report
  • [Presentation] A first-principles study on transport properties in magnetic tunnel junctions of Co-based Full-Heusler alloys with MgO barrier2007

    • Author(s)
      Yoshio Miura
    • Organizer
      International Symposium on Frontiers in Computational Science of Nanoscale Transport
    • Place of Presentation
      東京理科大学 森戸記念館
    • Year and Date
      2007-06-08
    • Related Report
      2007 Annual Research Report
  • [Presentation] Spin polarization and transport properties of Co2CrAl/GaAs heterostructure2006

    • Author(s)
      K. Nagao
    • Organizer
      International Conference on Quantum Simulators and Design
    • Place of Presentation
      Hiroshima (Japan)
    • Year and Date
      2006-12-04
    • Related Report
      2008 Final Research Report
  • [Book] Epitaxial Ferromagnetic Films and Spintronic Applications, eds. A. Hirohata and Y. Otani. ("First-principles calculations of half-metallic Heusler alloys")

    • Author(s)
      Masafumi Shirai, Yoshio Miura, and Kazutaka Abe
    • Publisher
      Research Signpost, Kerala, India, 2008(In print)
    • Related Report
      2007 Annual Research Report

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Published: 2005-04-01   Modified: 2018-03-28  

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