Electron theory of perpendicular magnetic anisotropy of Co-ferrite thin films

Jun Ichiro Inoue, Tomohiko Niizeki, Hideto Yanagihara, Hiroyoshi Itoh, Eiji Kita

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)

    Abstract

    We develop an electron theory for the t2g electrons of Co 2+ ions to clarify the perpendicular magnetic anisotropy (PMA) mechanism of Co-ferrite thin films by considering the spin-orbit interaction (SOI) and crystal-field (CF) potentials induced by the local symmetry around the Co ions and the global tetragonal symmetry of the film. Uniaxial and in-plane MA constants Ku and K1 at 0 K, respectively, are calculated for various values of SOI and CF. We show that reasonable parameter values explain the observed PMA and that the orbital moment for the in-plane magnetization reduces to nearly half of that of the out-of-plane magnetization.

    Original languageEnglish
    Article number027111
    JournalAIP Advances
    Volume4
    Issue number2
    DOIs
    Publication statusPublished - 2014 Feb 1

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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