ELECTRONIC TRANSPORT-PROPERTIES OF LAXY1-XAL2 ALLOYS

Transport properties of quasi-binary LaxY1-xAl2 alloys are presented o ver a wide temperature range from 4.2 to 1000 K. The observed non-line arity of the temperature-dependent electrical resistivity rho and ther mopower S is interpreted as originating from density-of-states (DOS) s tructures near the Fermi energy E(F). On the basis of the linear Boltz mann transport equation, an energy-dependent function phi(epsilon) is calculated from the experimental rho(T) and S(T) behaviour. Characteri stics of the DOS can be compared directly with phi(epsilon); such a co mparison with available theoretical DOS calculations is given. The cha nge in DOS with alloy composition and the effect of impurity scatterin g on the electrical resistivity and thermopower are discussed.