Evolution of magnetization reversal mechanism in Fe-Cr alloy films

被引：0
|
作者：
Gao, T.R. [1 ]
Hao, S.P. [1 ]
Zhou, S.M. [1 ]
Sun, L. [2 ]
机构：
[1] Surface Physics Laboratory (State Key Laboratory), Department of Physics, Fudan University, Shanghai 200433, China
[2] Department of Mechanical Engineering, University of Houston, Houston, TX 77204
来源：
Journal of Applied Physics | 2006年 / 100卷 / 07期
关键词：
A large thin film sample of Fex Cr1-x alloy with a composition gradient (x=0.38-0.52) has been prepared by co-sputtering to investigate magnetic anisotropy and magnetization effects on reversal mechanisms. The single-phased Fe-Cr films have a bcc structure with [110] preferred orientation. Since the magnetization decreases as the Fe content is decreased and the uniaxial anisotropy energy keeps at almost constant; the uniaxial anisotropic field HK is increased. At the same time; the pinning field Hp (0) changes little since the lattice constant of Fe-Cr alloy film does not change much with the composition. Consequently; the HK can be much larger than Hp (0) for low Fe concentrations and becomes comparable with increasing Fe concentration. As a result; the magnetization reversal mechanism evolves from a mode based on the pinning and motion of domain wall to another mode based on modified Kondorsky model as the Fe content is increased. © 2006 American Institute of Physics;
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