Magnetocaloric effect studying by means of theoretical models in Pr0.5Sr0.5MnO3 manganite

In this work, we have used many theoretical models to simulate the magnetocaloric effect (MCE) in the charge ordered Pr0.5Sr0.5MnO3 (PSMO) manganite. This sample undergoes a first order antiferromagnetic charge-ordered (AFM/CO) to a ferromagnetic (FM) transition at TCO∼165 K followed by a second order FM to paramagnetic (PM) transition at Curie temperature, TC∼255 K. The Mean-field theory and the Bean-Rodbell model are called to study deeply the MCE in FM-PM transition. Based on the mean-field theory, we proposed a numerical approach to study the evolution of magnetization versus temperature for the first order AFM/CO - FM transition. By using a phenomenological model, we have compared theoretical and experimental MCE for the above two transitions.