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Magnetic field induced ferromagnetic stable phase including low melting point metal

Research Project

Project/Area Number 16K14374
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Physical properties of metals/Metal-base materials
Research InstitutionKagoshima University

Principal Investigator

KOYAMA Keiichi  鹿児島大学, 理工学域理学系, 教授 (70302205)

Co-Investigator(Kenkyū-buntansha) 三井 好古  鹿児島大学, 理工学域理学系, 准教授 (90649782)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords強磁場物質科学 / 金属物性 / 磁性 / 物性実験 / 複合材料 / 結晶成長
Outline of Final Research Achievements

In-field heat treatments of Fe-Ga and Mn-Ga diffusion couple were performed to investigate the magnetic effect of Fe-Ga and Mn-Ga reactions. For Fe-Ga system, we obtained following results: (1) reactants were Fe3Ga、Fe3Ga+Fe6Ga5、Fe6Ga5、Fe3Ga4; (2) Fe-Ga reaction is diffusion controlled; (2) the reactant phase growth was suppressed by approximately 40% in magnetic field of 10 T. For Mn-Ga system, we found following results: (1) reactants were MnGa、Mn2Ga5、MnGa3, and the reaction is diffusion controlled. (2) The growth constant was determined and was not significantly affected by magnetic effects.

Academic Significance and Societal Importance of the Research Achievements

これまでの物質合成は、主に元素組成と温度の制御によって行われてきたが、本研究はさらに磁場による磁気エネルギーをつかって新しい物質合成方法について研究してきた。これまでに本研究と関連研究で5件の新しい物質合成に関わる磁場効果現象を見出してきた。本研究によって、磁場で特定のFeGa合金磁石材料の成長を抑制できることを見出した。これは、学術的新発見の大きな成果だけではない。主金属材料合成過程において、不要な合成物を磁場で成長させない技術開発に発展されることが期待される。本研究の成功によって、我が国の科学技術・産業応用など社会的意義の大きい結果を得た。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (6 results)

All 2019 2018 2017 2016 Other

All Presentation (5 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Presentation] MnーGa合金の反応に対する磁場効果2019

    • Author(s)
      渡邊有美、萩尾聡明、小林領太、三井好古、小山佳一
    • Organizer
      日本金属学会2019年春期講演大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Influence of magnetic field on diffusion and phase formation in Fe-Ga alloys2018

    • Author(s)
      Toshiaki Hagio, Yoshifuru Mitsui, Kohki Takahashi, Keiichi Koyama
    • Organizer
      The 3rd Asian Applied Physics Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Diffusion and phase formation of Fe-Ga alloys under magnetic field2017

    • Author(s)
      T. Hagio, Y. Mitsui, K. Takahashi, K. Koyama
    • Organizer
      International Conference on Magneto-Science 2017 Reims
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fe中Ga侵入過程の微視的評価2017

    • Author(s)
      萩尾聡明、三井好古、小山佳一、高橋弘紀
    • Organizer
      合同学術講演会(日本金属学会九州支部会)
    • Place of Presentation
      熊本大学(熊本県・熊本市)
    • Related Report
      2016 Research-status Report
  • [Presentation] Fe-Ga 系の反応とその組織2016

    • Author(s)
      萩尾聡明, 宮崎泰樹, 三井好古, 小山佳一
    • Organizer
      日本物理学会九州支部会
    • Place of Presentation
      福岡大学(福岡県・福岡市)
    • Related Report
      2016 Research-status Report
  • [Remarks] 鹿児島大学大学院理工学研究科物理宇宙専攻 磁気物理学(小山・三井研究室)

    • URL

      https://www.sci.kagoshima-u.ac.jp/koyama

    • Related Report
      2018 Annual Research Report

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Published: 2016-04-21   Modified: 2020-03-30  

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