The electrical resistivity of liquid Li-Sn, Na-Sn and Na-Pb alloys: strong effects of chemical interactions

Abstract

Electrical resistivities of liquid Li-Sn, Na-Sn and Na-Pb alloys have been measured. The resistivities exhibit distinct maxima close to 'stoichiometric' compositions: Li4Sn, Na4Sn, Na4Sn3 and Na4Pb. At the same compositions the temperature derivative d rho /dT is negative and -d rho /dT assumes extraordinarily large values. The effects are attributed to strong chemical interactions between the components. These interactions tend to reduce the density of states at the Fermi level.