Because the spin-flip length is longer than the electron mean-free-path in a metal, past studies of spin-flipscattering were limited to the diffusive regime.
金属中自旋翻转散射长度远长于电子平均自由程，近来关于自旋翻转散射效应的研究主要集中于扩散区域。
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We have developed a method that uses a magnetic double barrier tunnel junction to study spinflipscattering in nanometer sized spacer layers near the ballistic limit.