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Magnetocrystalline anisotropy of Fe-Si alloys on MgO(001)

机译:Fe-Si合金在MgO(001)上的磁晶各向异性

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摘要

Experimental investigations on magnetic anisotropy energies of epitaxial Fe_(100-x)Si_x thin films on MgO(001) have been extended to low Si concentration. We separated different contributions and found that the strain-induced magnetocrystalline anisotropy term favors an in-plane easy axis for the Fe_(94.5)Si_(5.5) sample, but an out-of-plane easy axis for the Fe_(75)Si_(25) sample. First principles calculations using the highly precise full potential linearized augmented plane wave method indicated that this results from the sign change in magne-toelastic coupling coefficient in the composition range. Analysis in electronic structures provides clear insights for the understanding of magnetic anisotropy in these films.
机译:MgO(001)上外延Fe_(100-x)Si_x薄膜的磁各向异性能的实验研究已扩展到低Si浓度。我们分离了不同的贡献,发现应变感应的磁晶各向异性项有利于Fe_(94.5)Si_(5.5)样品的平面内易轴,而Fe_(75)Si_( 25)样本。使用高精度全势线性化增强平面波方法进行的第一性原理计算表明,这是由成分范围内的磁弹耦合系数的符号变化引起的。电子结构分析为理解这些薄膜中的磁各向异性提供了清晰的见识。

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  • 来源
    《Physical review》 |2010年第14期|144418.1-144418.6|共6页
  • 作者单位

    Department of Physics and Astronomy, University of California, Irvine, California 92697, USA;

    rnDepartment of Physics and Astronomy, University of California, Irvine, California 92697, USA;

    rnFakultaet fuer Physik and Center for Nanointegration (CeNIDE), Universitaet Duisburg-Essen, Lotharstr. 1, 47048 Duisburg, Germany;

    rnFakultaet fuer Physik and Center for Nanointegration (CeNIDE), Universitaet Duisburg-Essen, Lotharstr. 1, 47048 Duisburg, Germany;

    rnFakultaet fuer Physik and Center for Nanointegration (CeNIDE), Universitaet Duisburg-Essen, Lotharstr. 1, 47048 Duisburg, Germany;

    rnFakultaet fuer Physik and Center for Nanointegration (CeNIDE), Universitaet Duisburg-Essen, Lotharstr. 1, 47048 Duisburg, Germany;

    rnDepartment of Physics and Astronomy, University of California, Irvine, California 92697, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fe and its alloys; magnetic anisotropy; transition metals and alloys; ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance;

    机译:Fe及其合金;磁各向异性过渡金属和合金;铁磁;反铁磁和亚铁磁谐振;自旋波共振;

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