COPPER NMR AND THERMODYNAMICS OF UCU5-XPDX - EVIDENCE FOR KONDO DISORDER

Strong inhomogeneous broadening of the copper NMR line in UCu5-xPdx, x = 1.0 and 1.5, indicates that spin susceptibility disorder contribute s to the non-Fermi-liquid behavior of these alloys. A simple phenomeno logical model with a distribution of Kondo temperatures fits the field and the temperature dependence of the susceptibility, and then descri bes the copper NMR linewidth semiquantitatively with no further adjust able parameters. The temperature and the field dependence of the speci fic heat also agree well with the model.