Lorentz microscopy of magnetic domain-wall pinning on artificially introduced holes in electrical steel sheets

Yoshikatsu Inada, Zentaro Akase, Daisuke Shindo, Akira Taniyama

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    To investigate the interaction between magnetic domain walls and defects in an electrical steel sheet by transmission electron microscopy, size-controlled holes were artificially introduced into specimens by a focused ion beam. By applying an external magnetic field in a transmission electron microscope, the magnetic domain structures around the holes were dynamically observed by Lorentz microscopy. Similar magnetic domain structures were observed around the holes, but the domain-wall pinning strength was found to depend on the hole size. Micromagnetic analysis was performed to ascertain the magnetic domain structures around the holes and to investigate the change in the magnetic energy during domain-wall pinning.

    Original languageEnglish
    Pages (from-to)1330-1333
    Number of pages4
    JournalMaterials Transactions
    Volume53
    Issue number7
    DOIs
    Publication statusPublished - 2012

    Keywords

    • Electrical steel sheet
    • In-situ observation
    • Lorentz microscopy
    • Magnetic domain-wall pinning

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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