采用经典电磁理论,对铁磁层/导电层/铁磁层(M/C/M)多层膜中出现的巨磁阻抗效应进行了理论分析.对于单轴横向磁各向异性多层膜,理论计算结果表明:高频阻抗在某一外加磁场(近似等于等效各向异性场)下出现最大值,铁磁层和导电层电阻率相差较大的多层膜中将出现较强的巨磁阻抗效应.多层膜在1MHz附近即可出现远大于单层膜的阻抗变化比.多层膜理论计算与实验结果能够较好地符合.
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