Thickness dependence of magnetization reversal mechanism in perpendicularly magnetized L10 FePt films
Thickness dependence of magnetization reversal mechanism in perpendicularly magnetized L10 FePt films
复制标题
DOI：
10.1016/j.jmmm.2016.12.126
复制
发表时间：
2017-04-15
影响因子：
2.7
通讯作者：
Xie, Jianliang
中科院分区：
文献类型：
--
作者：
Bi, Mei;Wang, Xin;Xie, Jianliang
我们研究了不同厚度的 L1(0) 有序 FePt 薄膜的磁开关行为。发现矫顽力强烈依赖于膜厚度。通过结构和磁性能的测量证实了薄膜中矫顽力的明显变化。随着厚度的增加，L1(0)化学有序度增加，而磁化反转过程从钉扎的两步磁化反转转变为相对平滑的磁畴壁运动行为。尽管考虑了各向异性、交换相互作用和外加磁场，薄膜中的转换行为相当复杂，但通过对沉积温度和磁场角度的影响进行详细研究，可以了解磁化反转机制的主要特征。
We have studied the magnetic switching behavior of L1(0)-ordered FePt films with varying thickness. It was found that coercivity is strongly dependent on the film thickness. The obvious variations of the coercivity in the thin films are confirmed by the measurements of structural and magnetic properties. With increasing thickness, the degree of L1(0) chemical ordering increased, while the magnetization reversal process transforms from a pinned two-steps magnetization reversal to a comparatively smooth domain wall motion behavior. Although considering anisotropy, exchange interaction and applied magnetic field, the switching behavior in films is quite complex, the main features of the magnetization reversal mechanism can be understood by performing detailed investigation on the effect of the deposition temperature and the angle of magnetic field.