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2010 Fiscal Year Self-evaluation Report

Theoretical study of localized spin devices with spin-wave-packet propagation to replace electron conduction devices

Research Project

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Project/Area Number 20710076
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Nanostructural science
Research InstitutionShizuoka University

Principal Investigator

KOKADO Satoshi  Shizuoka University, 工学部, 准教授 (50377719)

Project Period (FY) 2008 – 2011
Keywordsスピン緩和 / スピン-原子振動相互作用 / スピン-フォノン相互作用
Research Abstract

本研究は,従来の電子伝導素子の問題点※を克服するため,動作原理が異なる「スピン波束伝播型局在スピン素子」を提案し,その物性予測を行うことである.ここでスピン波束とは,磁性体内の連なった磁気モーメントの一部が傾いた励起状態であり,伝播の際,電子の移動は伴わない.
本研究の実施計画として次の項目を考える.
(1)スピン波束伝播の持続に大きな影響を与え得るスピン緩和について調べる.
(2)スピン緩和の一因であるスピン-原子振動相互作用V_<SA>を導出し,実際の材料に対して|V_<SA>|を評価する.
(3)V_<SA>によるスピン緩和時間を導出する.
(4)実験グループと連携を取りながら理論計算の結果を実際の材料開発に繋げる.
※問題点は,高い消費エネルギー,電流密度増大による素子破壊などである.

  • Research Products

    (12 results)

All 2011 2010 2009 2008 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (5 results) Remarks (1 results)

  • [Journal Article] Spin-atomic vibration interaction and spin-flip Hamiltonian of a single atomic spin in a crystal field2010

    • Author(s)
      Satoshi Kokado, Kikuo Harigaya, Akimasa Sakuma
    • Journal Title

      J.Phys.Soc.Jpn. 79

      Pages: 114721-11-4721-24

    • URL

      http : //ir.lib.shizuoka.ac.jp/handle/10297/5404

    • Peer Reviewed
  • [Journal Article] Anisotropy energy, spin-atomic vibration interaction, and spin-flip Hamiltonian of a single atomic spin system : application to iron ion2010

    • Author(s)
      Satoshi Kokado, Kikuo Harigaya, Akimasa Sakuma
    • Journal Title

      phys.stat.solidi(c)7 No.11-12

      Pages: 2612-2615

    • Peer Reviewed
  • [Journal Article] Anomalous Anisotropic Magnetoresistance in Pseudo Single Crystal γ'-Fe4N Films2010

    • Author(s)
      Masakiyo Tsunoda, Hirokazu Takahashi, Satoshi Kokado, Yosuke Komasaki, Akimasa Sakuma, Migaku Takahashi
    • Journal Title

      Appl.Phys.Express 3

      Pages: 113003-1-113003-3

    • Peer Reviewed
  • [Journal Article] Switching of a single atomic spin induced by spin injection : Effect of spin relaxation2009

    • Author(s)
      Satoshi Kokado, Kikuo Harigaya, Akimasa Sakuma
    • Journal Title

      phys.stat.solidi(c)6 No.10

      Pages: 2113-2118

    • Peer Reviewed
  • [Journal Article] Switching of a single atomic spin induced by spin injection : A model calculation2009

    • Author(s)
      Satoshi Kokado, Kikuo Harigaya, Akimasa Sakuma
    • Journal Title

      Proc.of the 9th Int.Symp.on Foundations of Quantum Mechanics in the Light of New Technology-ISQM-TOKYO 08

      Pages: 142-145

    • Peer Reviewed
  • [Journal Article] Negative Anisotropic Magnetoresistance in Fe4N Film2009

    • Author(s)
      Masakiyo Tsunoda, Yosuke Komasaki, Satoshi Kokado, Shinji Isogami, Che-Chin Chen, Migaku Takahashi
    • Journal Title

      Appl.Phys.Express 2

      Pages: 083001-1-083001-3

    • Peer Reviewed
  • [Presentation] Anisotropy Energy, Spin-Atomic Vibration Interaction, and Spin-Flip Hamiltonian of a Single Atomic Spin in a Crystal Field2011

    • Author(s)
      Satoshi Kokado, Kikuo Harigaya, and Akimasa Sakuma
    • Organizer
      American Physical Society March Meeting
    • Place of Presentation
      Dallas, Texas, USA
    • Year and Date
      2011-03-22
  • [Presentation] 単一原子スピン系のスピン-原子振動相互作用II2010

    • Author(s)
      古門聡士,針谷喜久雄,佐久間昭正
    • Organizer
      日本物理学会
    • Place of Presentation
      大阪府立大学中百舌鳥キャンパス
    • Year and Date
      2010-09-25
  • [Presentation] 単一原子スピンのスピン-原子振動相互作用2009

    • Author(s)
      古門聡士, 針谷喜久雄, 佐久間昭正
    • Organizer
      日本物理学会
    • Place of Presentation
      熊本大学黒髪キャンパス
    • Year and Date
      2009-09-25
  • [Presentation] Spin-atomic vibration interaction and spin-flip Hamiltonian of a single atomic spin2009

    • Author(s)
      Satoshi Kokado, Kikuo Harigaya, Akimasa Sakuma
    • Organizer
      Trends in Nanotechnology Conference
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2009-09-09
  • [Presentation] A Localized Quantum Spin Reversal by Spin Injection in A Spin Quantum Dot : Effect of Spin Relaxation2008

    • Author(s)
      Satoshi Kokado, Kikuo Harigaya, Akimasa Sakuma
    • Organizer
      Trends in Nanotechnology Conference
    • Place of Presentation
      Oviedo, Spain
    • Year and Date
      2008-09-03
  • [Remarks]

    • URL

      http://www.ipc.shizuoka.ac.jp/tskokad/

URL: 

Published: 2012-03-09   Modified: 2016-04-21  

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