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2008 Fiscal Year Final Research Report

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

Research Project

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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(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
Keywords第一原理計算 / スピントロニクス / 輸送 / 磁性 / 表面・界面
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

  • Research Products

    (14 results)

All 2009 2008 2007 2006

All Journal Article (9 results) (of which Peer Reviewed: 9 results) Presentation (5 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • Peer Reviewed
  • [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

    • 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

    • Peer Reviewed
  • [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
  • [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
  • [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
  • [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
  • [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

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Published: 2010-06-10   Modified: 2016-04-21  

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