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

Y. Sutou, Y. Imano, N. Koeda, T. Omori, R. Kainuma, K. Ishida, K. Oikawa

Research output: Contribution to journalArticle

854 Citations (Scopus)

Abstract

Martensitic and magnetic transformations of the Heusler Ni 50Mn50-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.

Original languageEnglish
Pages (from-to)4358-4360
Number of pages3
JournalApplied Physics Letters
Volume85
Issue number19
DOIs
Publication statusPublished - 2004 Nov 8

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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