论文标题
纵向自旋 - 裂变对CO $ _3 $ MN $ _2 $ GE的高温性能的影响
The effect of longitudinal spin-fluctuations on high temperature properties of Co$_3$Mn$_2$Ge
论文作者
论文摘要
证明热诱导的纵向旋转波动（LSF）在较高的温度下在巡回CO $ _3 $ _2 $ _2 $ GE中起着重要作用。在{\ it ab intio}通过简单模型计算相应熵贡献的过程中，将LSF的效果考虑在内。我们表明磁熵导致CO原子上中等大小的局部力矩出现。结果，这导致对磁交换相互作用的重新归一化，并对计算出的居里温度产生了很大的影响。考虑到LSF，可以将计算出的居里温度与实验值保持良好。
It is demonstrated that thermally induced longitudinal spin fluctuations (LSF) play an important role in itinerant Co$_3$Mn$_2$Ge at an elevated temperature. The effect of LSF is taken into account during {\it ab initio} calculations via a simple model for the corresponding entropy contribution. We show that the magnetic entropy leads to the appearance of a medium size local moment on Co atoms. As a consequence, this leads to a renormalization of the magnetic exchange interactions with a quite substantial impact upon the calculated Curie temperature. Taking LSF into account, the calculated Curie temperature can be brought to be in good agreement with the experimental value.
