Electron holography study of magnetization behavior in the writer pole of a perpendicular magnetic recording head by a 1 MV transmission electron microscope

Kei Hirata, Yoichi Ishida, Tetsuya Akashi, Daisuke Shindo, Akira Tonomura

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    The magnetic domain structure of the writer poles of perpendicular magnetic recording heads was studied using electron holography. Although the domain structure of a 100-nm-thick writer pole could be observed with a 300 kV transmission electron microscope, that of the 250-nm-thick writer pole could not be analyzed due to the limited transmission capability of the instrument. On the other hand, the detailed domain structure of the 250-nm-thick writer pole was successfully analyzed by a 1 MV electron microscope using its high transmission capability. The thickness and material dependency of the domain structure of a writer pole were discussed.

    Original languageEnglish
    Pages (from-to)305-308
    Number of pages4
    JournalJournal of Electron Microscopy
    Volume61
    Issue number5
    DOIs
    Publication statusPublished - 2012 Oct

    Keywords

    • 1 MV transmission electron microscope
    • electron holography
    • magnetic domain structure
    • magnetic recording head

    ASJC Scopus subject areas

    • Instrumentation

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