Interplay between Er and Co magnetism in ErCo2
Interplay between Er and Co magnetism in ErCo2
复制标题
ErCo2 中 Er 和 Co 磁性之间的相互作用
DOI：
10.1063/1.2836714
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发表时间：
2008
影响因子：
3.2
通讯作者：
A. Rogalev
中科院分区：
文献类型：
--
作者：
J. Herrero‐Albillos;D. Paudyal;F. Bartolomé;L. García;V. Pecharsky;K. Gschneidner;A. Young;N. Jaouen;A. Rogalev
在紧束缚线性松饼锡轨道方法中的第一性原理计算证实了磁有序相中Er4f和Co3d磁矩之间的亚铁磁耦合以及Co3d磁化强度在磁结构相变过程中的符号变化。实验X-射线磁性圆二色谱测量和理论结果都表明，稀土对CoSp带的影响很大，使得Sp带的极化不是跟随3d带的极化，而是由Er亚晶格的磁化强度决定的，无论是在磁有序状态还是在顺磁状态。
First principles calculations within the tight binding linear muffin tin orbital method confirm the ferrimagnetic coupling between the Er 4f and Co 3d moments in the magnetically ordered phase and the change of sign of the Co 3d magnetization across the magnetostructural transition. Both the experimental x-ray magnetic circular dichroism measurements and theoretical results show that the influence of the rare-earth moment on the Co sp band is so strong that the polarization of the sp band does not follow that of the 3d band, but is determined by the Er sublattice magnetization, both in the magnetically ordered and paramagnetic states.