Abstract
The volume paramagnetostriction of disordered alloys is calculated in the itinerant electron model. By assuming transfer energys and the number of d -electrons to vary with volume change, a general expression for the volume dependence of spin paramagnetic susceptibility is derived from the results for the spin paramagnetic susceptibility of a disordered binary alloy which is obtained in the coherent potential approximation and the t -approximation for the electron correlation. Numerical estimations of the spin paramagnetic susceptibility and its volume dependence are given for Pd–Rh, Ni–Rh and Pi–Ni alloys and a good agreement with experiments is obtained. It is found that a volume dependence of the transfer energy or the bandwidth has a main effect on the volume paramagnetostriction.
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