MAGNETISM AND CRYSTALLINE ELECTRIC-FIELD IN CEPT4B

We present data on the new intermetallic compound CePt4B crystallizing in the hexagonal CeCo4B-structure. From measurements of the specific heat, the resistivity and the susceptibility we deduce the basic physi cal properties of this system. It orders antiferromagnetically below T -N = 2.3 K. In the specific heat a pronounced lambda-anomaly at TN is found with a peak value of about 7 J/mol K. A second anomaly can be se en in the specific heat between T-N and 10 K, which we attribute to lo w-lying crystalline electric field levels. We discuss the connections between the crystalline electric field scheme and the magnetic behavio r.