Magnetocaloric effect simulation by Landau theory and mean-field approximation in Pr0.5Sr0.5MnO3
Laboratory of Physical Chemistry of Materials, Faculty of Science of Monastir, Department of Physics, University of Monastir, 5019, Monastir, Tunisia
2 Research unit of valorization and optimization of exploitation of resources, Faculty of Science and Technology of Sidi Bouzid, University Campus Agricultural City, University of Kairouan, 9100, Sidi Bouzid, Tunisia
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Accepted: 2 September 2019
Published online: 2 December 2019
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 K followed by a second-order ferromagnetic (FM) to paramagnetic (PM) transition at the Curie temperature, K. The magnetocaloric effect in PSMO has been studied by the simulation of the magnetic entropy change 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.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019