Magnetic transition and large reversible magnetocaloric effect in EuCu1.75P2 compound

摘要

The magnetocaloric effect (MCE) in EuCul.75P2 compound is studied by the magnetization and heat capacity measurements.Magnetization and modified Arrott plots indicate that the compound undergoes a second-order phase transition at Tc ～ 51 K.A large reversible MCE is observed around Tc.The values of maximum magnetic entropy change (-△SMmax)reach 5.6 J.kg-1.K-1 and 13.3 J.kg 1.K-1 for the field change of 2 T and 7 T,respectively,with no obvious hysteresis loss in the vicinity of Curie temperature.The corresponding maximum adiabatic temperature changes (△Taadmax) are evaluated to be 2.1 K and 5.0 K.The magnetic transition and the origin of large MCE in EuCu1.75P2 are also discussed.