Electron holography on remanent magnetization distribution of melt-spun Nd-Fe-B magnets

Young Gil Park, Daisuke Shindo

    研究成果: Article査読

    10 被引用数 (Scopus)

    抄録

    Microstructures and magnetic domain structures of melt-spun Nd-Fe-B permanent magnets were investigated in detail by analytical electron microscopy and electron holography. While the crystal orientation of matrix Nd 2Fe14B grains was analyzed by nanobeam electron diffraction, precipitates of a few tens of nanometers at grain boundaries were identified to be α-Fe by energy-dispersive X-ray spectroscopy. The detailed magnetization distribution in Nd2Fe14B grains and at their boundaries was visualized by electron holography. Ex situ experimentation with an electromagnet revealed that the domain walls in the demagnetized state and remanent states were pinned at grain boundaries, and Fe precipitates at the grain boundary were situated at the center of the closure domain.

    本文言語English
    ページ(範囲)43-47
    ページ数5
    ジャーナルJournal of Electron Microscopy
    53
    1
    DOI
    出版ステータスPublished - 2004

    ASJC Scopus subject areas

    • 器械工学

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