In-plane magnetic anisotropies in Fe3 O4 films on vicinal MgO(100)

L. McGuigan*, R. C. Barklie, R. G S Sofin, S. K. Arora, I. V. Shvets

*Corresponding author for this work

Research output: Contribution to journalArticle

25 Citations (Scopus)

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 Fe3 O4 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 Fe3 O4 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.

Original languageEnglish
Article number174424
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number17
DOIs
Publication statusPublished - May 21 2008

ASJC Scopus subject areas

  • Condensed Matter Physics

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