Hall Measurements in Liquid Thallium-Tellurium

Hall measurements are reported for compositions of Tl-Te between 31 and 60 at.% thallium and in the temperature range 340-640°C. The sign of the Hall coefficient is negative in spite of the fact that the Seebeck coefficient is positive. The Hall mobility does not change appreciably with temperature, and its magnitude seems to vary linearly with composition in the range 0-60 at.% thallium. The magnitude of the Hall mobility (0.3-0.5 ${\mathrm{cm}}^2$/V sec) and its small temperature coefficient is very similar to that observed in chalcogenide glasses, where the same sign discrepancy has been observed.