Critical behavior of Pr0.65Sr0.35MnO3 compound investigated by a Monte Carlo Simulation

Abstract

The critical behavior and magnetic properties of Pr0.65Sr0.35MnO3 (symbolized here by PSMO) were studied using Monte Carlo Simulation (MCS). The thermal bath algorithm and Ising model in which exchange interactions via the third nearest neighbor were used to calculate the magnetic and magneto-caloric properties. The effects of temperature (T) and external magnetic field (h) on the magnetic behavior of PSMO were examined. The results show that the Curie temperature (TC) is close to the experimental value. The magnetic entropy shows a maximum value around the TC that increases linearly with the increase of the external field. The critical behavior of the PSMO compound was studied by analyzing the magnetization isotherms and by exploiting Arrott plots. The obtained values of the critical exponents are β = 0.336, γ = 1.121, and δ = 4.335. These values are very close to those reported for the 3D-Ising model. The variation of maximum magnetic entropy (ΔSmmax) and relative cooling power (RCP) around the Curie temperature were calculated; the obtained values of ΔSmmax and those of RCP ranging from 3.612 and 92.7 for 1T to 6.191 and 209.9 for 5T, respectively. These results are sufficiently interesting to consider the PSMO compound as a promising candidate for magnetic refrigeration.