Giant magnetoresistance and interlayer exchange coupling in Ni-Co/Cu multilayer films

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Abstract

The oscillation of giant magnetoresistance and interlayer exchange coupling as a function of Cu thickness was studied for Ni-Co/Cu multilayer films prepared by magnetron sputtering onto a glass substrate. They had a fcc (111) preferred orientation parallel to the growth direction. Both the value of magnetoresistance ratio and interlayer exchange coupling strength increased with increasing Co content, which were in qualitative agreement with theoretical calculations. The strength of exchange coupling was proportional to the square of the saturation magnetization.

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    Present address: Department of Material Engineering and Applied Chemistry, Akita University, Akita 010, Japan.

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