Abstract
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 eta factor of eta = 0.71. Using the experimental data of magnetizationM(H,T), the molecular mean-field parameter is found to be lambda(1) = 2.19 T g emu(-1). The Brillouin function makes it possible to determine the total angular momentJ, the saturation magnetizationM(S), and the Lande factorgfor 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 Delta 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.