Theoretical study of the magnetic properties and the magnetocaloric effect in lanthanum manganite lacunar compounds

Based on the Monte Carlo method and using the Ising model, the magnetic as well as the magnetocaloric properties of lacunar compounds La1-xxMnO(3) (x = 0.1 and 0.2) were investigated. Free boundary conditions for our system were applied to simulate the 3D-Ising Hamiltonian of these systems. Cubic magnetic sublattices of size L-3, with L = 20, 24 and 28, were investigated in this study to compute the magnetization and the magnetic susceptibility as a function of temperature (T) at various applied fields. In order to calculate the variation of the magnetic entropy versus the applied magnetic field, we have examined an isothermal process by considering a term of magneto-crystalline anisotropy. In order to validate the results, many parameters were calculated. The results obtained are in good agreement with the experimental ones. The high relative cooling power values of our compounds leads to promising material for magnetic refrigeration technology. This material could be considered as a good candidate for applications requiring high values of TC. (c) 2022 Elsevier B.V. All rights reserved.

Automated summary

This study investigated the magnetic and magnetocaloric properties of lacunar compounds La1-xxMnO(3) using the Monte Carlo method and Ising model. The results obtained from simulations were in good agreement with experimental data. The compounds showed high relative cooling power values, making them promising materials for magnetic refrigeration technology and potential candidates for applications requiring high TC values.