Magnetism and Magnetocaloric Effect in EuAuZn

The magnetic properties and magnetocaloric effect (MCE) in the ternary intermetallic compound EuAuZn have been studied via magnetization and heat capacity measurements. The compound orders ferromagnetically below T_C ~ 52 K with a spin reorientation transition at T_SR ~ 19 K. A large reversible MCE has been observed in EuAuZn accompanied by a second-order magnetic phase transition from a paramagnetic to a ferromagnetic state. Under a field change of 5 T, the maximum values of magnetic entropy change (-ΔS_M^max) and adiabatic temperature change (ΔT_ad^max) are 9.1 J/kg·K and 3.8 K, respectively, the corresponding relative cooling power is 318 J/kg.