Magnetic and martensitic transformations of NiMnX(X=In,Sn,Sb) ferromagnetic shape memory alloys

DOI PDF 被引用文献72件
  • Y. Sutou
    Biomedical Engineering Research Organization, Tohoku University , 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
  • Y. Imano
    Department of Materials Science, Graduate School of Engineering, Tohoku University , Aoba-yama 02, Sendai 980-8579, Japan
  • N. Koeda
    Department of Materials Science, Graduate School of Engineering, Tohoku University , Aoba-yama 02, Sendai 980-8579, Japan
  • T. Omori
    Department of Materials Science, Graduate School of Engineering, Tohoku University , Aoba-yama 02, Sendai 980-8579, Japan
  • R. Kainuma
    Department of Materials Science, Graduate School of Engineering, Tohoku University , Aoba-yama 02, Sendai 980-8579, Japan
  • K. Ishida
    Department of Materials Science, Graduate School of Engineering, Tohoku University , Aoba-yama 02, Sendai 980-8579, Japan
  • K. Oikawa
    National Institute of Advanced Industrial Science and Technology , 4-2-1 Nigatake, Miyagino-ku, Sendai 983-8551, Japan

抄録

<jats:p>Martensitic and magnetic transformations of the Heusler Ni50Mn50−yXy (X=In, Sn and Sb) alloys were investigated by differential scanning calorimetry measurement and the vibrating sample magnetometry technique. In all these alloy systems, the austenite phase with the ferromagnetic state was transformed into the martensite phase, which means that these Heusler alloys have potential as Ga-free ferromagnetic shape memory alloys (FSMAs). Furthermore, multiple martensitic transformations, such as two- or three-step martensitic transformations, occur in all these alloy systems. It was confirmed by transmission electron microscopy observation that the crystal structure of the martensite phase is an orthorhombic four-layered structure which has not been reported in other FSMAs. Therefore, the present Ga-free FSMAs have the great possibility of the appearance of a large magnetic-field-induced strain.</jats:p>

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