AB-INITIO CALCULATIONS OF RESIDUAL RESISTIVITIES FOR DILUTE NI-ALLOYS

We report residual resistivity calculations for dilute Ni alloys which are based on density-functional theory and the Korringa-Kohn-Rostoker Green's-function method. The transport is described quasiclassically by means of the Boltzmann equation using a two-current model for the ferromagnetic host. In particular we consider 3d, 4d, 4sp, and 5sp impurities in Ni and include in addition to the impurity potential one shell of perturbed host potentials in the calculation. For the residual resistivity, satisfactory agreement with the experiments is obtained in practically all cases. We clarify the role of both subbands for the transport properties and compare the calculated ratios of subband resistivities with experimentally determined values.