Electron holography study of remanence states in exchange-biased MnPd/Fe bilayers grown epitaxially on MgO(001)

Jong Seok Jeong, Zentaro Akase, Daisuke Shindo, Qing Feng Zhan, Kannan M. Krishnan

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    We investigated magnetic remanence states of epitaxially grown, exchange-biased MnPd/Fe bilayers by electron holography emphasizing the crystallographic orientations of the layers. Thin-foil transmission electron microscopy (TEM) specimens were carefully prepared along both hard and easy axes of the Fe layer. The ex situ magnetization-reversal process was carried out using the TEM specimens, and magnetic flux densities of the ultra-thin Fe layers were evaluated at different remanence states. We show that a spin configuration in the TEM specimens is determined by the competition between an exchange coupling at the MnPd/Fe bilayer interface, shape anisotropy of TEM specimens and intrinsic magnetocrystalline anisotropy of Fe.

    Original languageEnglish
    Pages (from-to)235-242
    Number of pages8
    JournalJournal of Electron Microscopy
    Volume60
    Issue number3
    DOIs
    Publication statusPublished - 2011 Jun

    Keywords

    • TEM
    • demagnetizing effects
    • electron holography
    • exchange bias
    • magnetic flux density
    • shape anisotropy

    ASJC Scopus subject areas

    • Instrumentation

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