Effects of Fe Buffer Layer Thickness on Magnetoresistance in Ni-Fe/Cu Multilayers

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Abstract
We present the magnetoresistance and film structure in Ni-Fe/Cu multilayers depend on the Fe buffer layer thickness. With 5-8 nm thick Fe buffer layers, the multilayers have preferred orientations and show high magnetoresistance ratios. On the other hand, when the thickness is 0-4 or 9-10 nm, they have preferred orientations and show low magnetoresistance ratios. The Fe buffer layer thickness affects the preferred orientation, furthermore the preferred orientation strongly correlates to the MR ratio.