Thermoelectric Power of the URu_1-xPd_xGe System

Abstract

We report the measurements of thermoelectric power, S(T ), of the URu1−xPdxGe solid solutions in the temperature range 1.9300 K. It is found that S(T ) of URuGe is consistent with the behaviour of Kondo lattice, characterized by a low-temperature negative minimum and a high-temperature positive maximum. On the contrary, S(T ) of the compositions 0.1 ≤ x ≤ 0.7 is negative over the whole temperature range measured and shows only one negative minimum around 200 K. The compositions x = 0.9 and 1, in addition to a high-temperature negative minimum, exhibit anomalies at low temperatures, presumably associated with the magnon drag. We interpret the experimental data assuming the presence of the Kondo and crystal-electric eld eects.