Direct observation and dynamics of spontaneous skyrmion-like magnetic domains in a ferromagnet

Masahiro Nagao, Yeong Gi So, Hiroyuki Yoshida, Masaaki Isobe, Toru Hara, Kazuo Ishizuka, Koji Kimoto

    研究成果: Article査読

    45 被引用数 (Scopus)

    抄録

    The structure and dynamics of submicrometre magnetic domains are the main factors determining the physical properties of magnetic materials. Here, we report the first observation of skyrmion-like magnetic nanodomains in a ferromagnetic manganite, La0.5 Ba0.5 MnO3, using Lorentz transmission electron microscopy (LTEM). The skyrmion-like magnetic domains appear as clusters above the Curie temperature. We found that the repeated reversal of magnetic chirality is caused by thermal fluctuation. The closely spaced clusters exhibit dynamic coupling, and the repeated magnetization reversal becomes fully synchronized with the same chirality. Quantitative analysis of such dynamics was performed by LTEM to directly determine the barrier energy for the magnetization reversal of skyrmion-like nanometre domains. This study is expected to pave the way for further investigation of the unresolved nature and dynamics of magnetic vortex-like nanodomains.

    本文言語English
    ページ(範囲)325-328
    ページ数4
    ジャーナルNature Nanotechnology
    8
    5
    DOI
    出版ステータスPublished - 2013 5

    ASJC Scopus subject areas

    • バイオエンジニアリング
    • 生体医工学
    • 材料科学(全般)
    • 電子工学および電気工学
    • 凝縮系物理学
    • 原子分子物理学および光学

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