Magnetic Field-Induced Martensitic Transformation of Fe-Co Particles in a Cu Matrix

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  • Fujii Toshiyuki
    Department of Innovative and Engineered Materials, Tokyo Institute of Technology
  • Kato Tomotsugu
    Department of Innovative and Engineered Materials, Tokyo Institute of Technology
  • Yamada Takayuki
    Department of Innovative and Engineered Materials, Tokyo Institute of Technology
  • Kato Masaharu
    Department of Innovative and Engineered Materials, Tokyo Institute of Technology
  • Nimori Shigeki
    Tsukuba Magnet Laboratory, National Institute for Materials Science
  • Ohtsuka Hideyuki
    Tsukuba Magnet Laboratory, National Institute for Materials Science

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Description

The fcc-to-bcc martensitic transformation in Fe-Co precipitate particles has been induced by applying magnetic field to Cu-Fe-Co alloy single crystals at a range of temperature between 4 K and 300 K. The volume fractions of martensite can be estimated from the values of saturation magnetization of the bulk specimens. The amount of transformation is strongly dependent on the cooling temperature, and reaches its peak at around 77 K. The existence of the peak temperature is explained by considering the antiferromagnetic transformation of fcc Fe-Co.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 44 (12), 2545-2549, 2003

    The Japan Institute of Metals and Materials

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