On the Electromagnetic Properties of Single Crystals of Tellurium. III : Adiabatic and Isothermal Hall Effect, and Ettingshausen Effect

A study has been made of the comparison of the adiabatic and the isothermal Hall effects of a tellurium crystal from -180°to +350℃. An ordinary d. c. method was used for the adiabatic effect and a potentiometric nil-method utilizing a 1000 cycles a. c. was employed for the isothermal one. The difference of two kinds of Hall coefficients was found to be less than 10 per cent below 230℃, but above 240℃ the adiabatic coefficient has a value as low as 85~50 per cent of the isothermal coefficient. This notwithstanding, the remarkable sign reversal is observed at 240℃ also in the isothermal Hall coefficient, which fact evinces itself to be one of the essential properties of tellurium