The magnetocaloric effect in Pr0.5Sr0.5MnO3 (PSMO) has been successfully modeled in this work. PSMO undergoes a first-order antiferromagnetic charge ordering (AFM/CO) to a ferromagnetic (FM) transition at T C O = T N ∼ 165 K followed by a second-order ferromagnetic (FM) to paramagnetic (PM) transition at the Curie temperature, T C ∼ 255 K. The magnetocaloric effect in PSMO has been studied by the simulation of the magnetic entropy change $ (-\Delta S_M)$ ( - Δ S M ) for these two transitions by developing a numerical approach based on the Landau free energy within the mean-field approximation. Simulated results agree well with the experimental ones for these two transitions.
University Campus Agricultural City, University of Kairouan, Research unit of valorization and optimization of exploitation of resources, Faculty of Science and Technology of Sidi Bouzid, Sidi Bouzid, Tunisia
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.