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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Relation between electronic structure and magnetic anisotropy in amorphous TbCo films probed by x-ray magnetic circular dichroism
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Relation between electronic structure and magnetic anisotropy in amorphous TbCo films probed by x-ray magnetic circular dichroism

机译：X射线磁性圆二色性探测非晶态TbCo薄膜中电子结构与磁各向异性的关系

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摘要

Magnetic anisotropy of amorphous TbCo films was investigated by x-ray absorption spectroscopy (XAS), x-ray magnetic circular dichroism (XMCD) and synchrotron radiation x-ray diffraction (XRD). The easy magnetization axis was out-of-plane and in-plane for the as-deposited and annealed films, respectively. Remarkable features observed with regard to annealing were a peak-energy shift and increased asymmetry in the Co L-2,L-3 XMCD spectra and variations of the fine structures in the Tb M-4,M-5 XMCD spectra. A quantitative analysis of the XMCD results revealed that the Co 3d spin magnetic moment decreased and the orbital magnetic moment increased with annealing. On the other hand, both Tb 4f spin and orbital magnetic moments decreased with annealing. In contrast to the clear change in XAS and XMCD by annealing, no significant change in the amorphous structure was detected by XRD.
机译：通过X射线吸收光谱（XAS），X射线磁性圆二色性（XMCD）和同步辐射X射线衍射（XRD）研究了非晶TbCo薄膜的磁各向异性。对于沉积和退火的膜，易磁化轴分别为平面外和平面内。在退火方面观察到的显着特征是Co L-2，L-3 XMCD光谱中的峰能移动和不对称性增加，以及Tb M-4，M-5 XMCD光谱中的精细结构变化。对XMCD结果的定量分析表明，随着退火，Co 3d自旋磁矩减小，轨道磁矩增大。另一方面，Tb 4f自旋和轨道磁矩均随退火而降低。与退火引起的XAS和XMCD的明显变化相反，XRD并未检测到非晶结构的显着变化。

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