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Theoretical study on the inter-grain magnetic interaction in the panoscopic assembled rare earth magnetic materials

Research Project

Project/Area Number 20900107
Allocation TypeSingle-year Grants
Research InstitutionTohoku University

Principal Investigator

SAKUMA Akimasa  東北大学, 大学院工学研究科, 教授 (30361124)

Co-Investigator(Kenkyū-buntansha) TSUCHIURA Hiroki  東北大学, 大学院工学研究科, 助教 (30374961)
Project Period (FY) 2008
Project Status Completed (Fiscal Year 2008)
Keywords希土類磁石 / Nd_2Fe_<14>B / 交換スプリング磁石 / 保磁力 / 結晶磁気異方性 / ナノコンポジット磁石
Outline of Final Research Achievements

磁性体の結晶粒間の磁気的相互作用を電子論的立場から定量的に評価し、(ナノスケールで)パノスコピック形態制御された高機能磁性材料の設計指針を提供することを目的に、密度汎関数法に基づく電子状態の第一原理計算から、バルクNd_2Fe_<14>BおよびNd_2Fe_<14>B/α-Fe交換スプリング構造における結晶磁気異方性と層間の交換相互作用エネルギーの評価を行った。さらに、これらの物質定数をもとにランダウ-リフシッツ-ギルバート(LLG)方程式を用いた磁化曲線のシミュレーションにより、交換スプリング磁石の最大エネルギー積を見積もった。

Report

(2 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • Research Products

    (7 results)

All 2009 2008

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (5 results)

  • [Journal Article] First-Principles Calculation of the Crystal Field Parameter near the Surfaces and Interfaces of Nd_2Fe_<14>B2009

    • Author(s)
      H. Moriya, et.al.
    • Journal Title

      Journal of Applied Physics 105

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Critical Thickness of Antiferromagnetic Layer in Exchange Biasing Bilayer System2008

    • Author(s)
      C. Mitsumata, et.al.
    • Journal Title

      Journal of the Physical Society of Japan 77

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] Nd_2Fe_<14>B磁石の界面における結晶場の第一原理的評価2009

    • Author(s)
      土浦宏紀、等
    • Organizer
      日本金属学会2009年春季大会
    • Place of Presentation
      東京
    • Year and Date
      2009-03-29
    • Related Report
      2008 Annual Research Report
  • [Presentation] Nd_2Fe_<14>Bにおける結晶場パラメータの第一原理的評価2008

    • Author(s)
      守谷浩志、等
    • Organizer
      応用物理学会東北支部第63回学術講演会
    • Place of Presentation
      仙台
    • Year and Date
      2008-12-05
    • Related Report
      2008 Annual Research Report
  • [Presentation] First-Principles Calculation of the Crystal Field Parameter near the Surfaces and Interfaces of Nd_2Fe_<14>B2008

    • Author(s)
      H. Moriya, et.al.
    • Organizer
      MMM 53rd Magnetism and Magnetic Materials Conference
    • Place of Presentation
      Austin(USA)
    • Year and Date
      2008-11-12
    • Related Report
      2008 Annual Research Report
  • [Presentation] Nd_2Fe_<14>B/α-Fe交換スプリング磁石の界面近傍における磁気特性の第一原理計算2008

    • Author(s)
      栂裕太、等
    • Organizer
      第32回日本磁気学会学術講演会
    • Place of Presentation
      仙台
    • Year and Date
      2008-09-15
    • Related Report
      2008 Annual Research Report
  • [Presentation] Ab initio Calculation of the magnetic structures in Nd_2Fe_<14>B/α-Fe nanocomposite materials2008

    • Author(s)
      Y. Toga, et.al.
    • Organizer
      INTERMAG 2008
    • Place of Presentation
      Madrid(Spain)
    • Year and Date
      2008-05-06
    • Related Report
      2008 Annual Research Report

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Published: 2010-06-11   Modified: 2016-11-18  

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