Electron holography studies on magnetic domains in ferromagnetic shape memory alloys

Yasukazu Murakami, H. S. Park, J. H. Yoo, D. Shindo, K. Oikawa, R. Kaimuma, K. Ishida

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    Magnetization distribution in ferromagnetic shape memory alloys has been studied by electron holography and Lorentz microscopy. The observations have revealed that a martensite variant, which is a crystallographic domain in ferromagnetic shape memory alloys, is divided into several 180° magnetic domains in a Ni 2MnGa alloy. The magnetization vectors of the 180° domains are basically oriented along the easy magnetization axis due to the high magnetocrystalline anisotropy of the martensite. Close relations between the magnetic domains and the antiphase domains in the parent phase of a Ni 51Fe 22Ga 27 alloy were also revealed by in situ observations with electron holography.

    Original languageEnglish
    Pages (from-to)207-211
    Number of pages5
    JournalMetals and Materials International
    Volume10
    Issue number3
    Publication statusPublished - 2004 Jun 1

    Keywords

    • Electron microscopy
    • Martensite
    • Martensitic transformation

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanics of Materials
    • Metals and Alloys
    • Materials Chemistry

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