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Mn-Ga based Hard Magnets with High Coercivity and Ductility

Research Project

Project/Area Number 22656149
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeSingle-year Grants
Research Field Structural/Functional materials
Research InstitutionTohoku University

Principal Investigator

KAINUMA Ryosuke  東北大学, 大学院・工学研究科, 教授 (20202004)

Co-Investigator(Renkei-kenkyūsha) UMETSU Rie  東北大学, 金属材料研究所, 助教 (60422086)
Project Period (FY) 2010 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥3,550,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥450,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2010: ¥1,600,000 (Direct Cost: ¥1,600,000)
Keywordsハード磁石 / Mn合金 / 析出 / 磁場中時効 / 結晶磁気異方性 / ハード磁石材料 / 希土類フリー / 状態図 / 規則-不規則変態 / 磁気変態
Research Abstract

In this project, a rare-earth metal-free magnet is aimed to be developed in the Mn-Ga based alloy systems. Mn-Ga binary and Mn-Ga-X (X : Ni, Co, Cu)ternary phase diagrams have experimentally been determined in the beginning. It was found that the hcp phase suppressing appearance of the ferromagnetic D0_<22> phase exists at high temperatures in the wide composition range and that the situation is not improved by addition of the elements X. On the other hand, a Mn-Ga-Cu alloy showing a large coercivity of about 10kOe has been found.

Report

(3 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report
  • Research Products

    (11 results)

All 2012 2011 2010 Other

All Journal Article (9 results) (of which Peer Reviewed: 9 results) Presentation (2 results)

  • [Journal Article] Temperature-induced martensite in magnetic shape memory Fe_2MnGa observed by photoemission electron microscopy2012

    • Author(s)
      C. A. Jenkins, A Scholl, R. Kainuma, H. J. Elmers, T Omori
    • Journal Title

      Appl. Phys. Letters

      Volume: 100 Pages: 32401-32401

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Temperature-induced martensite in magnetic shape memory Fe2MnGa observed by photoemission electron microscopy2012

    • Author(s)
      C.A. Jenkins, A. Scholl, R.Kainuma, H. J. Elmers, and T, Omori
    • Journal Title

      App. Phys. Letters

      Volume: 100 Issue: 3 Pages: 32401-32401

    • DOI

      10.1063/1.3677939

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Phase equilibria in the Mn-rich portion of Mn-Ga binary system2012

    • Author(s)
      K.Minakuchi
    • Journal Title

      J.Alloys and Compounds

      Volume: (未定)(印刷中)

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetocrystalline Anisotropy in Fe-Mn-Ga Magnetic Shape Memory Alloy2011

    • Author(s)
      T. Omori, K. Watanabe, X. Xu, R. Y. Umetsu, R. Kainuma and K. Ishida
    • Journal Title

      Scripta Mater.

      Volume: 64 Pages: 669-672

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Magnetocrystalline anisotropy in Fe-Mn-Ga magnetic shape memory alloy2011

    • Author(s)
      T.Omori, ら
    • Journal Title

      SCRIPTA MATERIALIA

      Volume: 64 Pages: 669-672

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Martensitic transition, ferromagnetic transition, and their interplay in the shape memory alloys Ni_2Mn_<1-x> CuxGa2010

    • Author(s)
      M. Kataoka, K. Endo, T. Kanomata, H. Nishihara, T. Shindo, R. Y. Umetsu, M. Nagasako and R. Kainuma
    • Journal Title

      Phys. Rev. B

      Volume: 82 Pages: 214423-214423

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Kinetic Arrest of Martensitic Transformation in Ni_<33.0>Co_<13.4>Mn_<39.7>Ga_<13.9> Metamagnetic Shape Memory Alloy2010

    • Author(s)
      X.Xu, ら
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 51 Pages: 469-471

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Martensitic transition, ferromagnetic transition, and their interplay in the shape memory alloys Ni_2Mn_<1-x>Cu_xGa2010

    • Author(s)
      M.Kataoka, ら
    • Journal Title

      PHYSICAL REVIEW B

      Volume: 82

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Phase equilibria in the Mn-rich portion of Mn-Ga binary system

    • Author(s)
      K. Minakuchi, R. Y. Umetsu, K. Ishida and R. Kainuma
    • Journal Title

      J. Alloys and Compounds

      Volume: (印刷中)

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Presentation] Fcc/fccマルテンサイト変態を有するMnCu合金の変態温度と強度に及ぼすC添加の影響2010

    • Author(s)
      村田聡, 梅津理恵, 長迫実, 大森俊洋, 石田清仁, 貝沼亮介
    • Organizer
      (社)日本金属学会2010年(第147回)秋期講演大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2010-09-26
    • Related Report
      2011 Final Research Report
  • [Presentation] fcc/fctマルテンサイト変態を有するMnCu合金の変態温度と強度に及ぼすC添加の影響2010

    • Author(s)
      村田聡, ら
    • Organizer
      2010年第147回日本金属学会秋期大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2010-09-26
    • Related Report
      2010 Annual Research Report

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Published: 2010-08-23   Modified: 2016-04-21  

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