Modeling of Magnetic and Magnetocaloric Properties by the Molecular Mean Field Theory in La0.6Sr0.4Mn0.9V0.1O3 Oxide

Based on the mean-field theory, the magnetic and magnetocaloric behavior of La 0.6 Sr 0.4 Mn 0.9 V 0.1 O 3 manganese oxide has been analyzed. The Bean-Rodbell equation of state presents a second-order magnetic phase transition with a η factor of η = 0.71. Using the experimental data of magnetization M ( H , T ), the molecular mean-field parameter is found to be λ 1 = 2.19 T g emu −1 . The Brillouin function makes it possible to determine the total angular moment J , the saturation magnetization M S , and the Lande factor g for La 0.6 Sr 0.4 Mn 0.9 V 0.1 O 3 sample. We simulated the magnetization as a function of the magnetic field and the temperature by applying the mean-field theory, as well as the variation of the magnetic entropy change Δ S M (T). As observed, the simulated results close with experimental data. The magnetic entropy changes for the samples were also estimated by using the mean-field scaling theory, and the results show a difference between the theoretical and experimental values.