Thermopower and thermal conductivity of Kondo lattice CeCu4Al

The thermal conductivity κ and thermopower S are discussed for the Kondo lattice CeCu4Al compound. Thermopower is positive over the whole temperature range and below Tmax = 27 K falls rapidly. Based on a simple band model the position and width of the 4f peak nearest to the Fermi level have been estimated. The measured thermal conductivity of the CeCu4Al compound increases almost linearly with increasing temperature. The values of L/L0 for CeCu4Al are typical of heavy fermion compounds. At low temperatures the magnetic field has the strongest effect on the thermopower and thermal conductivity. The maximum value of S(T) and temperature of the peak, Tmax are independent of applied magnetic field.