Anomalous magnetic field dependence of magnetocaloric effect at low temperature in Pr0.52Sr0.48MnO3 single crystal
ABSTRACT We report the magnetocaloric effect (MCE) in a Pr 0.52 Sr 0.48 MnO 3 single crystal. A peak in the temperature dependence of magnetic entropy change (ΔS M ) with a fairly large negative value (≈3.8 J / kg K ) is observed at 275 K close to Curie temperature. MCE is spread over a wide temperature range resulting in a considerable refrigerant capacity (≈293 J / kg ) . At low temperature the sign of ΔS M changes, below which anomalous field dependence of ΔS M is observed indicating the coexistence of ferromagnetic and antiferromagnetic interactions. Interplay between the interactions is strongly influenced by direction and magnitude of applied magnetic field in the ordered state.