Magnetic Properties of Cobalt Ferrite (001) Films Grown on Spinel-Type Buffer Layers

Yuki Hisamatsu, Tomohiko Niizeki, Hideto Yanagihara, Eiji Kita

    Research output: Contribution to journalArticle

    Abstract

    To improve the interface magnetism of CoxFe3-xO4 (CFO) films that are grown on MgO substrates and exhibit extremely large perpendicular magnetic anisotropy, we attempted to insert two different spinel-type oxides [CoCr2O4 (CCO) and MgTi2O4 (MTO)] between the CFO films and their MgO(001) substrates. Although both buffer layers were epitaxially grown on MgO(001), the CFO films grown on CCO/MgO(001) became polycrystalline with a significantly lower level of magnetization, while the magnetization of the CFO films on MTO/MgO(001) fell as a function of the thickness of the MTO layer. A secondary ion mass spectroscopy analysis revealed a remarkable interdiffusion of Co and Mg.

    Original languageEnglish
    Article number7131553
    JournalIEEE Transactions on Magnetics
    Volume51
    Issue number11
    DOIs
    Publication statusPublished - 2015 Nov 1

    Keywords

    • Ferrite films
    • Magnetic anisotropy
    • Magnetostriction

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering

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