Strain-induced magnetic anisotropy in epitaxial thin films of the spinel CoCr2O4
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2015-12
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Journal Article
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Abstract
We show that the magnetic anisotropy in spinel-structure CoCr₂O₄ thin films exhibits a strain dependence in which compressive strain induces an out-of-plane magnetic easy axis and tensile strain induces an in-plane easy axis, exactly opposite to the behavior reported for the related compound CoFe₂O₄. We use density functional theory calculations within the LSDA+U approximation to reproduce and explain the observed behavior. Using second-order perturbation theory, we analyze the anisotropy tensor of the Co²⁺ ions in both octahedral and tetrahedral coordination, allowing us to extend our results to spinels with general arrangements of Co²⁺ ions.
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published
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92 (21)
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214429
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American Physical Society
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03903 - Spaldin, Nicola A. / Spaldin, Nicola A.
Notes
Published online 21 December 2015.