Temperature-Dependent de Haas-Van Alphen Parameters in Zinc

The magnetic susceptibility of a single crystal of zinc has been investigated from 4.2°K to 300°K in fields up to 25 kilogauss. Traces of the de Haas-van Alphen effect persisted at temperatures as high as 200°K. The period of the characteristic susceptibility oscillations increased with increasing temperature, rising from 6.4×${10}^{-5\mathrm{}}$ ${\mathrm{gauss}}^{-1\mathrm{}}$ at 4.2°K to 12.5×${10}^{-5\mathrm{}}$ ${\mathrm{gauss}}^{-1\mathrm{}}$ at 61.2°K. If present interpretations of the de Haas-van Alphen parameters are valid, temperature dependent effective masses, or chemical potential, or both are implied for the pertinent electrons. A rough calculation indicates that temperature dependences of the right order of magnitude might arise from alteration of the overlap of Brillouin zone boundaries by the Fermi surface as a result of anisotropic thermal expansion of the lattice.