Magnetic and transport properties of BaNiSn3 type CeCuAl 3 under pressure

Abstract

We have measured ac susceptibility Xac and electric resistivity ρ of polycrystalline CeCuAl3 under pressure. At ambient pressure, Xac(T) shows a peak and ρ(T) also a kink, the temperature of which increases gradually with pressure. These anomalies are attributed to a localized antiferromagnetic transition. The ρ(T) shows another broad peak at around 10 K at ambient pressure, which increases monotonically with pressure. We suggest that this peak comes from the small crystalline electric field splitting combined with Kondo effect and the increase is due to enhancement of the splitting by applying pressure. © 2009 IOP Publishing Ltd.