Modeling the magnetic properties of La0.62Er0.05Ba0.33Fe0.2Mn0.8O3: Mean-field study and Bean Rodbell model

The Brillouin function, the phase transition and the related magnetic properties in La 0.62 Er 0.05 Ba 0.33 Fe 0.2 Mn 0.8 O 3 perovskite have been studied using Bean-Rodbell model. The Brillouin function allows determining the total momentum J and the mean filed exchange parameter λ of the perovskite. The mean-filed equation draws the system to second order phase transition. These constants were used to stimulate the experimental isotherms M (H, T) by meanfield theory. The predicted results are compared to the available experimental data. It is noted that a good agreement has been found, with minor discrepancies, between theoretical and experimental data.