界面对Fe_(65)Co_(35)薄膜微结构和软磁性的影响

Effect of interface on microstructure and soft magnetic properties of Fe_(65)Co_(35) thin films

用不同的材料(Co93Fe7和Fe)作衬底层,利用磁控溅射法成功制备了Fe65Co35(主层)/衬底层结构的双层薄膜.通过X射线衍射和磁性测量发现,在不同的衬底上沉积的Fe65Co35薄膜的织构不同,并且(200)取向的Fe65Co35薄膜的面内各向异性和软磁性优于(110)取向的Fe65Co35薄膜.通过典型样品的穆斯堡尔谱分析发现,Fe65Co35薄膜的磁化强度矢量具有一定的垂直分量,并且当Fe65Co35薄膜为(110)取向时磁化强度矢量的垂直分量比(200)取向时要大.进一步的研究发现,这种现象是由Fe65Co35薄膜与衬底层接触界面上应力诱导的界面各向异性导致的.

Bilayer films with Fe65Co35 main layer/underlayer structure were successfully prepared by magnetron sputtering on different underlayers （Co93Fe7 and Fe）. X-ray diffraction （XRD） analysis and magnetic measurements show that Fe65Co35 thin films deposited on different underlayers have different textures. Moreover, the soft magnetic properties of Fe_65Co_35 thin films with （200） texture are better than that of Fe65Co35 thin films with （110） texture. Investigation of several typical samples by conversion electron Mssbauer spectrum （CEMS） reveals that the vector of magnetization of Fe65Co35 thin films have a little deviation from the film plane, and the deviation from the film plane of Fe65Co35 thin films with （110） texture are bigger than that of Fe65Co35 thin films with （200） texture. Further study exhibits that this phenomenon is caused by the interface anisotropy induced by magnetoelastic anisotropy at the interface between Fe65Co35 thin film and underlayer.