Magnetization distribution in Nd4.5Fe77B 18.5 nanocomposite magnets studied by electron holography

Y. G. Park, D. Shindo, H. Kanekiyo, S. Hirosawa

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    Magnetic nanostructures at demagnetized and remanent states in Nd 4.5Fe77B18.5 nanocomposite magnets are investigated by electron holography, utilizing the specially designed electromagnet. The quantitative mapping of magnetization distribution at a nanometer scale using a polar diagram has been reported for both the demagnetized and remanent states. Through the polar diagrams for the remanent state, the homogeneous distribution of magnetic flux is found in the specimen annealed at a low temperature, while the fluctuated distribution is found in the specimen annealed at a high temperature. The difference is considered to be responsible for their magnetic properties, i.e., remanence and coercivity.

    Original languageEnglish
    Article number3
    Pages (from-to)5302-5304
    Number of pages3
    JournalApplied Physics Letters
    Volume85
    Issue number22
    DOIs
    Publication statusPublished - 2004 Nov 29

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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