Magnetic susceptibility of vanadium carbide

Autor: Bloom, D. W., Finegold, L., Tveten, A., Lye, R. G.
Zdroj: Philosophical Magazine; September 1971, Vol. 24 Issue: 189 p603-612, 10p
Abstrakt: The magnetic susceptibility of single-crystal VCx (x = 0.76, 0.81, 0.84, 0.87) has been found to decrease sharply as x increases from 0.76, in qualitative agreement with the results of previous measurements made by Bittner and Goretzki on powder specimens. The present results, however, show a minimum near x=0.84 followed by a slight increase at x=0.87, and in this respect are similar to the observations of Borukhovich and his collaborators in their studies of the other Group V carbides NbCx and TaCx. This variation of the susceptibility is attributed primarily to the (Van Vleck) oribital paramagnetism, supporting the suggestion made previously by Froidevaux and Rossier. A simple model for the orbital paramagnetism in VCx is shown to account qualitatively for the observed variation with carbon content.
Databáze: Supplemental Index