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摘要: 用Camley和Barnas等人的唯象理论方法,计算了相邻铁层间具有反铁磁耦合的层数较多的Fe/Cr多层膜,在外磁场平行和垂直于膜面情况下的磁电阻与外磁场的关系,并与实验结果作了比较,符合得较好。在计算中利用对称性条件,对Camley和Barnas等人的理论进行了简化,求出了电子分布函数和磁电阻的显式解。
Abstract: Based on the phenomenological theory of Camley and Barnas and coworkers (C-B), the dependence of magnetoresistance in Fe/Cr multilayers on the applied magne-tic field is calculated. In these multilayers an antiferromagnetic coupling exists between any two adjacent Fe-layers. The applied magnetic field is either parallel or perpendicular to the layers. Good agreement of the calculated results with the experimental ones is found. The symmetry implicitly involved in the C-B theory is disclosed and is used to simplify the original C-B formalism, this leads to the closed expressions for the distribution function of conducting electrons and for magnetore-sistance.