Perpendicular magnetic anisotropy in epitaxially strained cobalt-ferrite (001) thin films

H. Yanagihara, Y. Utsumi, T. Niizeki, J. Inoue, Eiji Kita

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    30 Citations (Scopus)

    Abstract

    We investigated the dependencies of both the magnetization characteristics and the perpendicular magnetic anisotropy of CoxFe3- xO4(001) epitaxial films (x=0.5 and 0.75) on the growth conditions of the reactive magnetron sputtering process. Both saturation magnetization and the magnetic uniaxial anisotropy constant Ku are strongly dependent on the reactive gas (O2) flow rate, although there is little difference in the surface structures for all samples observed by reflection high-energy electron diffraction. In addition, certain dead-layer-like regions were observed in the initial stage of the film growth for all films. Our results suggest that the magnetic properties of Co xFe3-xO4 epitaxial films are governed by the oxidation state and the film structure at the vicinity of the interface.

    Original languageEnglish
    Article number17A719
    JournalJournal of Applied Physics
    Volume115
    Issue number17
    DOIs
    Publication statusPublished - 2014 May 7

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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