Monte Carlo Study of the Magnetic and Magnetocaloric Properties of La1-xCaxMnO3 (x=0.33 and 0.5)

In our work the temperature dependencies of magnetization, entropy changes, and the Curie temperature (T-C) of La1-xCaxMnO3 (x = 0.33 and 0.5) were investigated using Monte Carlo method and Heisenberg model. In our simulation, magnetic Mn3+ and Mn4+ ions are described by classical Heisenberg spins, while oxygen, lanthanum and calcium ions are considered as nonmagnetic. The Mn magnetic ions are distributed on a simple cubic lattice according to the perovskite structure of the manganite. The theoretical Curie temperatures and magnetocaloric values are in a good agreement well with experimental data.