Tuning anomalous Hall conductivity in L10 FePt films by long range chemical ordering
Tuning anomalous Hall conductivity in L10 FePt films by long range chemical ordering
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DOI：
10.1063/1.3556616
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发表时间：
2011-02
影响因子：
4
通讯作者：
Ming Chen;Z. Shi;Wenjin Xu;Xixiang Zhang;J. Du;Shiming Zhou
中科院分区：
文献类型：
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作者：
Ming Chen;Z. Shi;Wenjin Xu;Xixiang Zhang;J. Du;Shiming Zhou
对于L10 FePt薄膜，反常霍尔电导率σxy=−aσxx−B，其中a= a0 f（T），B= b 0 f（T），f（T）是自发磁化的温度依赖因子。随着化学长程有序S的增加，a0改变其符号，伴随着其幅度的减小，而b 0单调增加。自旋-轨道耦合强度随S的增加而增加。作为一种方法，长程化学有序可以用来控制铁磁合金薄膜中的反常霍尔效应。
For L10 FePt films, the anomalous Hall conductivity σxy=−aσxx−b, where a=a0f(T), b=b0f(T), and f(T) is the temperature dependence factor of the spontaneous magnetization. With increasing chemical long range ordering S, a0 changes its sign accompanied by a reduction of its magnitude and b0 increases monotonically. The spin-orbit coupling strength is suggested to increase with increasing S. As an approach, the long range chemical ordering can be used to control the anomalous Hall effect in ferromagnetic alloy films.