TRANSPORT-PROPERTIES OF CEAU(2-X)CU(X)IN

Measurements on the electrical resistivity rho, the thermopower S and the specific heat C have been done on CeAu2-xCuxIn samples (0 less-than-or-equal-to x less-than-or-equal-to 0.5) having a cubic Heusler-type crystal. A crystal-phase transition possibly originating from a band Jahn-Teller effect was evidenced from sudden changes of rho and S. Neel temperature T(N) of the samples was found to be 1.2 K and did not depend on the value of x. Structures in rho and S are considered to originate from a Kondo interaction. However, a small and negative value of S and a realization of a full entropy value of R In 2 slightly above T(N) indicate that the Kondo interaction is weak.