Analytical electron microscopy and electron holography on microstructures and magnetic domain structures of Sm-Co 2:17 magnets

Young Gil Park, Jun Mo Yang, Daisuke Shindo

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    Microstructures and magnetic domain structures of precipitation-hardened Sm-Co permanent magnets were systematically investigated by analytical electron microscopy and electron holography. By an elemental mapping method with energy-dispersive X-ray spectroscopy the change in the local distribution of additive elements, i.e. Cu, Fe and Zr, in Sm-Co magnets with various heat treatments was visualized and the enrichment of Zr in the Z-phase with a width of ∼1 nm was clarified directly. Detailed analysis with electron holography revealed that considerable fluctuation in the distribution of lines of magnetic flux in the step-aged magnet was due to the chemical partitioning of additives and resulted in magnetic hardening during the magnetization process.

    Original languageEnglish
    Pages (from-to)267-270
    Number of pages4
    JournalJournal of Electron Microscopy
    Volume53
    Issue number3
    DOIs
    Publication statusPublished - 2004

    Keywords

    • EDS elemental mapping
    • Electron holography
    • Lines of magnetic flux
    • Lorentz microscopy
    • Sm-Co magnet

    ASJC Scopus subject areas

    • Instrumentation

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