Exchange-coupled MBE-grown Co/Cu/Co(111) trilayers

A. J R Ives, J. A C Bland, T. Thomson, P. C. Riedi, M. J. Walker, J. Xu, D. Greig

    Research output: Contribution to journalArticlepeer-review


    It is shown that the high-field curvature in the in-plane and polar magnetization curves of exchange-coupled MBE-grown Co/Cu/Co(111) structures can be accurately fitted by assuming a sizeable biquadratic coupling in addition to the bilinear coupling, and the existence of a large areal fraction of ferromagnetic inclusions. Measurements on a sample with a single Co layer confirm that the curvature does not originate from the individual Co layers. Analysis of two Co/Cu/Co(111) trilayers with different Co-Cu interface qualities, as measured by NMR, shows significantly higher bilinear and biquadratic coupling strengths for the trilayer with the better defined Co-Cu interfaces. While NMR indicates reasonably good structural quality on a short lateral length scale, polar Kerr measurements as a function of interlayer thickness, and polarized neutron reflection measurements, indicate the existence of structural imperfections on a long lateral length scale.
    Original languageEnglish
    Pages (from-to)301-320
    Number of pages19
    JournalJournal of Magnetism and Magnetic Materials
    Issue number3
    Publication statusPublished - May 1996


    • Anisotropy
    • Biquadratic coupling
    • Co/Cu
    • Exchange coupling
    • Interface quality
    • Kerr effect
    • MBE
    • NMR
    • Trilayer


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