LOW-TEMPERATURE SPECIFIC-HEAT AND SUSCEPTIBILITY OF THE HEAVY FERMION SYSTEMS CECU3AL2 AND CECU3GA2

Low temperature specific heat and susceptibility measurements down to about 50 mK indicate heavy fermion behaviour for CeCu3Al2 and CeCu3Ga2. For T→0 the electronic contribution to the specific heat attains more than 0.9 J{plus 45 degree rule}mol K2 and more than 1.5 J{plus 45 degree rule}mol K2 for CeCu3Al2 and CeCu3Ga2, respectively. For both compounds the temperature dependent specific heat is described within the spin 1 2 single impurity Kondo model taking TK = 9.5 and 4.2 K. © 1990.