Studying the Magnetocaloric Effect in Nd0.55Sr0.45MnO3 Manganite by the Mean-field Model

In this paper, we exploited the mean field model to simulate the magnetocaloric effect (MCE) in Nd0.55Sr0.45MnO3 manganite which undergoes second-order ferromagnetic (FM)-paramagnetic (PM) phase transition. A scaling method, based on mean field theory, leads to a direct estimation of the exchange parameter (λ), the saturation magnetization (M0), the total angular momentum (J) and the gyromagnetic factor (g) of Nd0.55Sr0.45MnO3 sample. These parameters were used for simulating the magnetic isotherms, M (H, T), and the magnetic entropy change, −∆SM(T). The theoretical calculations are compared with the experimental behavior.