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有无6 T强磁场条件下利用分子束气相沉积方法制备了不同厚度的Fe80Ni20薄膜.研究发现,薄膜的面内矫顽力随厚度增加而降低且符合Neel理论;矩形比随厚度的增加先快速增大后缓慢降低;6 T磁场抑制了颗粒团聚及异常长大,并降低了薄膜表面的粗糙度,这使薄膜的矫顽力要小于无磁场作用的薄膜,矩形比大于无磁场作用的薄膜;而且薄膜在垂直于基片表面的6 T磁场作用下由0 T下的面内磁各向异性转变为磁各向同性.
The results show that the in-plane coercivity decreases with the increase of the thickness and conforms to the Neel theory; the squareness ratio increases rapidly with the increase of the thickness of the Fe80Ni20 thin films 6 T magnetic field inhibited the particle agglomeration and abnormal growth, and reduce the surface roughness of the film, which makes the film coercive force is less than the film without a magnetic field effect, the rectangular shape than the film without a magnetic field ; And the film is transformed into magnetic isotropy by in-plane magnetic anisotropy at 0 T under a 6 T magnetic field perpendicular to the substrate surface.