CONSEQUENCES OF RELATIVITY FOR THE HYPERFINE INTERACTIONS - WITH APPLICATIONS TO TRANSITION-METALS

The strong influence of relativity on the hyperfine interaction is dem onstrated by non-, scalar and fully relativistic calculations for soli d transition metal systems. By calculations of hyperfine fields and of the nuclear spin lattice relaxation rate of Ag in AgxPt1-x it is show n that scalar relativistic calculations, which neglect the influence o f spin-orbit coupling, seem to be sufficient to account for relativist ic effects in many cases. To account properly for the symmetry-breakin g caused by spin-orbit coupling, which is reflected by many hyperfine interaction properties, a fully relativistic approach is demanded. The corresponding formalism in the framework of the KKR-GF (Korringa-Kohn -Rostoker-Green's function) method of band structure calculation for m agnetic solids is outlined. As applications results for the hyperfine fields of pure transition metals and alloys are presented.