TEMPERATURE DEPENDENCE OF THE ELECTRIC FIELD GRADIENT AT TRANSITION IMPURITIES IN CLOSE-PACKED HEXAGONAL METALS

Abstract

The temperature dependence of the electric field gradient at transition impurities in normal close-packed hexagonal metals is shown to be consistent with an appreciable contribution from virtual bound 3d states. By studing the crystal field influence on this virtual level in a Friedel-Anderson model, the localized electronic contribution to the EFG appears to be linearly related to the density of 3d states at the Fermi level. So, the experimental data from Mössbauer spectroscopy for the temperature dependence of the EFG in the [MATH]-Fe dilute alloy can be ascribed to the effects of localized spin fluctuations