Investigation of Hall Resistivity and Magnetoresistance of Cadmium and Cadmium-Zinc Crystals

Abstract

Measurements of the Hall resistivity and magnetoresistance of cadmium and cadmium-zinc crystals in the residual-resistance-ratio range of 40 000-240, corresponding to a maximum zinc concentration of 1.5 at.%, are reported in the temperature ranges of 1.4-4.2, 9-20, and at 77 K for magnetic fields below 25 kG. The Hall resistivity is positive for values $\omega \tau <1\mathrm{}$, but below 20 K and for $\omega \tau >1\mathrm{}$ it can be positive or negative, depending on temperature and impurity concentration. The results indicate that the concept of a single static electron scattering time has to be abandoned in the case of reduced phonon scattering. The similarity between the effects of impurity and pressure on the Hall resistivity is indicated to be compatible with the concept of intersheet scattering.