TEM studies on the microstructure in ferromagnetic shape memory alloys

Yasukazu Murakami, T. Yano, D. Shindo

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The magnetic domain structures of the cubic parent phase (high-temperature phase) in ferromagnetic shape memory alloys (SMAs) have been studied by electron holography. In a Ni51Fe22Ga17 alloy, the magnetic flux distribution in the parent phase changes dramatically before the onset of martensitic transformation. In contrast, a Ni45Co 5Mn36.7In13.3 alloy - a recently developed ferromagnetic SMA - does not show appreciable changes in the magnetic domain structure upon cooling. The anomaly observed in the Ni51Fe 22Ga17 alloy appears to be due to lattice distortions, which become more pronounced as the temperature approaches the martensitic transformation start temperature, Ms.

    Original languageEnglish
    Title of host publicationMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
    PublisherTrans Tech Publications
    Pages515-518
    Number of pages4
    ISBN (Print)0878493786, 9780878493784
    DOIs
    Publication statusPublished - 2008
    EventMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures - Hong Kong, P.R., China
    Duration: 2008 Jul 282008 Jul 31

    Publication series

    NameAdvanced Materials Research
    Volume47-50 PART 1
    ISSN (Print)1022-6680

    Other

    OtherMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
    Country/TerritoryChina
    CityHong Kong, P.R.
    Period08/7/2808/7/31

    Keywords

    • Actuator
    • Electron microscopy
    • Magnetic domain
    • Magnetic flux
    • Martensite
    • Martensitic transformation

    ASJC Scopus subject areas

    • Engineering(all)

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