Electric Field Gradients in Dilute Alloys of Copper with Nonmagnetic Transition Impurities

Recent NMR experiments on dilute alloys of copper with nonmagnetic transition impurities can be explained if one assumes a nearly, but not completely, filled $d$ shell on the impurity. This model gives, for the resistivities and the field gradients, theoretical results in good agreement with the experiments. The field gradients are calculated taking into account both the valency and the size differences between the impurity and the copper.