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Structural and phase composition and magnetoresistive properties of three-layer film systems based on permalloy and copper are investigated. The samples are obtained by the method of layer by layer condensation followed by heat treatment in the 300-700 K temperature range. It is shown that the spin-dependent electron scattering is realized in the layer thickness range of dCu 6-15 nm and dPy 25-40 nm for as-deposited and annealed at 400 K samples. It is established that the maximum isotropic magnetoresistance is observed after annealing of the samples at 400 K, and annealing at 550 K leads to the emergence of anisotropic magnetoresistance.

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