Lorentz microscopy study on magnetization reversal process in single-domain state in perovskite-type manganite

Shuichi Mamishin, Hiroto Kasai, Weixing Xia, Yasukazu Murakami, Daisuke Shindo, Shigeo Mori, Akira Tonomura

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The phenomenon of ferromagnetic domain switching, which occurred in a colossal magnetoresistive manganite La0:25Pr0:375Ca 0:375MnO3, was studied by sophisticated transmission electron microscopy techniques. Lorentz microscopy observations revealed the size dependence of the magnetization reversal behaviors. A small single-domain (70 nm) exhibited a direct switching process to another single-domain form, while a large single domain (150 nm) showed a multiple-domain configuration before the transformation to another single-domain state. We also demonstrated significant magnetic interaction in an assembly of single domains; i.e., neighboring single domains underwent magnetization reversal simultaneously. The results provide useful information for a deeper understanding of the switching process in a single-domain state, which can be observed in many advanced materials related to magnetic data storage media.

    Original languageEnglish
    Pages (from-to)630031-630034
    Number of pages4
    JournalJapanese journal of applied physics
    Volume49
    Issue number6 PART 1
    DOIs
    Publication statusPublished - 2010 Jun

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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