Structure, magnetic properties and magnetocaloric effect in LaMnSbO_0.8F_0.2oxypnictide material

Abstract

We have investigated the structural, magnetic properties and magnetocaloric effect (MCE) in LaMnSbO 0.8 F 0.2 . The compound has the ZrCuSiAs-type structure with P4/nmm space group. For a field change of 0-5 T, the maximum entropy change (-DS M ) is calculated to be 0.074 J kg À1 K by using the Maxwell's relations from the magnetic isotherms. The relative cooling power was increasing from 0.67 to 3.74 J kg À1 with the increases of magnetic field changes from 0-1 to 0-5 T. The observed reversible MCE is related to a second-order magnetic phase transition.