MAGNETIC-SUSCEPTIBILITY MEASUREMENTS OF TL1-XSEX ALLOYS CLOSE TO THE STOICHIOMETRIC COMPOSITION TL2SE

Magnetic susceptibility measurements provide information that is close ly related to the electronic density of states of a material, and have been used in the past to provide information on the energy dependent electrical conductivity in liquid metallic systems. In this paper the results of a preliminary study of the variation of magnetic susceptibi lity and conductivity of a narrow definition liquid semiconductor, T1- xSex, within the composition range 0.31 less than or equal to x less t han or equal to 0.36 and temperature range 300-600 degrees C are prese nted. The results show that there is a minimum in the electronic densi ty of states at the stoichiometric composition of Tl2Se which correspo nds to the observed minimum in electrical conductivity. It is shown th at the transport properties are similar to another liquid semiconducto r system, Ag1-xSex, within the same composition range, except at stoic hiometry where Ag2Se shows anomalous conductivity behaviour.