目前有关磁性多层膜的巨磁电阻效应许多理论在处理时虽然并不尽相同,但就其物理本质和机制来说都源于自旋相关散射,这一点是大家普遍公认的.巨磁电阻的产生来自于自旋散射的不对称,也即散射势与自旋有关,然而更为重要的是依赖于自旋的散射势究竟是怎样产生的,这个问题至今尚无定论,是当前人们所关注的焦点. At present, many theories about the giant magnetoresistance effect of magnetic multilayers, although not always the same in their treatment, derive from spin-dependent scattering due to their physical nature and mechanism, and it is generally accepted that giant magnetoresistance Arises from the asymmetry of spin-scattering, that is, the scattering potential is related to spin, but more importantly depends on how the scattering potential of spin actually arises. This question is still inconclusive at this time The focus of attention.