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首页> 外文期刊>IEEE Transactions on Magnetics >Large Negative Uniaxial Magnetic Anisotropy in Epitaxially Strained Nickel Ferrite Films
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Large Negative Uniaxial Magnetic Anisotropy in Epitaxially Strained Nickel Ferrite Films

机译：外延应变镍铁氧体薄膜中的大负单轴磁各向异性。

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摘要

We investigated the magnetic properties of NiFe2O4(NFO) epitaxial films grown on MgAl2O4(MAO) substrates by the reactive radio frequency magnetron sputtering method. The films were found to be coherently distorted to at least 61 nm thickness because of the lattice mismatch between MAO and NFO. The NFO(001) films exhibited large negative uniaxial anisotropy that can be quantitatively explained by the magneto-elastic theory despite the lattice distortion being as much as 3%. We also discovered magnetic anomalies in both the saturation magnetization and anisotropy of the thinnest film, which may because of the reconstruction of the electronic structures at NFO interfaces.
机译：我们通过反应射频磁控溅射方法研究了在MgAl2O4（MAO）衬底上生长的NiFe2O4（NFO）外延膜的磁性。由于MAO和NFO之间的晶格失配，发现该膜的相干畸变至少61 nm。 NFO（001）膜表现出较大的负单轴各向异性，尽管晶格畸变高达3％，但可以用磁弹性理论定量解释。我们还发现了最薄薄膜的饱和磁化强度和各向异性中的磁异常，这可能是由于NFO界面电子结构的重建。

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