Abstract
The nuclear magnetic resonance of dilute V51 in Ni–Cu alloys and V51 in Ni–V alloys was observed in paramagnetic state. The measured Knight shift showed no temperature dependence between 77°K and 300°K whereas some of these alloys had temperature dependent susceptibilities. This behavior is similar to the dilute V51 Knight shift in palladium.
The magnetic susceptibilities of these alloys were measured and the temperature independent part was obtained by extrapolation to infinite temperature. A linear relationship was found between the temperature independent susceptibility and the V51 Knight shift for all of these alloys. From the slope of this linear relation, it was revealed that the major part of the change of the V51 Knight shift is due to the core polarization of vanadium atom induced by the temperature independent paramagnetism of the host metal. These results are interpreted by the model that the vanadium atom hardly feels the magnetic moments of neighboring nickel atoms because of the small susceptibility of the impurity atom resulting from its very deep charge potential in these alloys.
