Abstract
The magnetotransport properties of Ni81Fe19/W90Ti10 multilayers are investigated. The effect of the thicknesses of magnetic (Ni81Fe19) and nonmagnetic (WTi) layers on the magnetoresistance (MR) is theoretically discussed in the framework of the Johnson–Camley semiclassical approach based on the Boltzmann transport equation. A comparison between the calculated and measured MR ratios is obtained. The observed MR ratio oscillates for WTi layer thickness with an average period of 10 A. A weak MR(tNiFe) ratio for a fixed tWTi is obtained, and it presents a maximum peak of the MR with a value of 0.8 % located at tNiFe = 50 A. In addition, electronic and magnetic properties of multilayers are investigated by self-consistent ab initio calculations based on the Korringa–Kohn–Rostocker (KKR) approximation. Spin polarized within the framework of the coherent potential approximation (CPA) is considered for calculations.
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