STUDIES OF PRESSURE EFFECTS ON THE HEAVY-FERMION COMPOUND OF CEPB3

Pressure effects on CePb3 have been studied by the measurements of the electrical resistivity, specific heat and magnetic susceptibility. Th e pressure dependence of the resistivity gives a Gruneisen constant fo r the Kondo temperature, Omega(TK) similar to 62, which is one of the largest values in the magnetic heavy fermion compounds. The relation b etween the Gruneisen constant for the Kondo temperature of the ground doublet state and that for the whole state of J = 5/2 can be described in terms of the impurity Kondo model in the presence of the crystal f ield. The pressure effect on a pure CePb3 is almost equivalent to the chemical pressure effect in the system of Ce(Pb1-ySny)(3), except for magnetic ordering. (C) 1998 Elsevier Science Ltd. All rights reserved.