Specific heat and magnetic susceptibility of CeAuSn and CeAgSn

Abstract

Specific heat measurements C( T) on hexagonal CeAuSn and CeAgSn and meaurements of the magnetic susceptibility ξ(T) for CeAuSn are reported for the first time. Both composed-show transitions with antiferromagnetic character. For CeAuSn the transition is found at 4.1 K and for CeAgSn at 6.45 K Above T N the specific heat is represented byC/T- λ 11.1 + βT 2 with considerably enhancedγ HT of 270 mJ mol −1 K −2 for CeAuSn and 210 mJ mol −1 K −2 for CeAgSn. Below the transition temperatureC/T decreases, extrapolating to a value of about 100 mJ mol −1 K −2 for both compounds.