In-plane magnetic anisotropies in Fe3O4 films on vicinal MgO (100)
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2008Citation:
McGuigan, L.; Barklie, R. C.; Sofin, R. G. S.; Arora, S. K.; Shvets, I. V., In-plane magnetic anisotropies in Fe3O4 films on vicinal MgO (100), Physical Review B, 77, 17, 2008, 174424Download Item:
Abstract:
Ferromagnetic resonance was used to study the influence of vicinal (miscut) angle and film thickness on in-plane fourfold and uniaxial magnetic anisotropies in epitaxial Fe3O4 films grown on vicinal MgO(100) surfaces. The in-plane fourfold anisotropy constant K4? is approximately the same for all films but the dominant in-plane uniaxial constant K2? varies linearly with the inverse Fe3O4 layer thickness and approximately quadratically with the vicinal angle. A second, weaker, in-plane uniaxial term is evident for the film on a larger miscut (10?) substrate. The easy axis of the dominant in-plane uniaxial term is perpendicular to the step edges. The dominant in-plane uniaxial anisotropy has one term inversely proportional to the film thickness that is associated with anisotropy localized at the interface and a second term that is independent of film thickness; the latter may arise from the preferential alignment of antiphase boundaries with the step edges.
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American Physical SocietyType of material:
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Physical Review B;77;
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