Pt插层对Co/FeMn界面的影响

采用磁控溅射的方法制备了Co/FeMn/Co多层膜，研究了Co（底部）/FeMn和FeMn/Co（顶部）界面插入Pt层后磁矩的变化情况．通过测量磁滞回线可知，Co（底部）/FeMn界面的Pt插层改变了体系的饱和磁化强度Ｍ_s，随着Co层厚度（t_Co）的增加Ｍ_s不断趋近于Co块体结构理论值1440 kA/m．这是因为Co（底部）/FeMn界面产生了净磁矩，而界面处的Pt插层可以减少这种净磁矩的产生．但是 关键词： 磁性多层膜 垂直磁各向异性 交换耦合

Effect of Pt spacers on the interface of Co/FeMn

Co/FeMn/Co multilayers were prepared by magnetmn sputtering. The change of magnetic moments by insertion of Pt spacer at the Co (bottom)/FeMn interface and FeMn/Co (top) interface has been investigated. According to the hysteresis loops measured by alternating gradient magnetometer (AGM), the saturation magnetization (M_s) of muhilayers is changed by the Pt spacer at the Co (bottom)/FeMn interface, and there is an asymptotic approaeh of M_s to the theoretical value of M_s of the cobalt bulk of 1440 kA/m as the thickness of Co layer (t_(Co)) is increased. This behavior is due to the production of net magnetic moments at the Co (bottom)/FeMn interface, which are decreased by Pt spacer at the Co (bottom)/FeMn interface. However, a significant difference between the Co (bottom)/FeMn interface and the FeMn/Co (top) interface is observed, as little influence of the Pt spacer on magnetic moments is shown when inserted at the FeMn/Co (top) interface.