Theory of impurity hyperfine field systematics in ferromagnetic hosts

Using the spin-density functional formalism, we have studied the hyperfine fields at interstitial and substitutional impurities in ferromagnetic Ni systematically as a function of the outer-electron configuration and atomic number of the impurities. The core as well as scattering electron contributions to the impurity hyperfine fields are calculated fully selfconsistently. The parameters describing the host electronic structure are obtained from first principle band structure calculations. The results for the systematics in the hyperfine fields are in satisfactory agreement with experiment. (orig.)