Antiferromagnetism and crystal-field effects in CeCuX3 (X=Al,Ga) compounds

Abstract
We have studied two new tetragonal compounds, CeCuAl3 and CeCuGa3, which both display very large specific‐heat, c(T), values at low temperature. CeCuAl3 orders antiferromagnetically below TN=3.0 K, while CeCuGa3 remains paramagnetic down to 0.4 K. The large values of c(T) in these and other cerium intermetallics are interpreted as resulting from an unusually small crystal‐field splitting and the possible presence of atomic disorder.

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