Abstract

Electronic and ionic conductivities of liquid Tl–Se alloys have separately been measured as a function of concentration and temperature. The system shows a deep minimum in the electronic conductivity at the stoichiometric composition (Tl 2 Se). A characteristic decay time which is calculated from the slope of the potential decay is found to decrease with temperature for the liquid Tl 2 Se. An anomaly in the ionic conductivity around the composition Tl 2 Se has been observed. A very unusual negative temperature dependence of the ionic conductivity has been confirmed at Tl-rich range beyond the composition Tl 2 Se.

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