Exploration of magnetocaloric properties in LaFeO3 perovskite: A mean-field theory combined with the Ising model

In this study, we investigate the magnetocaloric effect and magnetothermal properties of the LaFeO${}_3$ compound using mean field approximation by examining its behavior as a function of temperature and applied magnetic field. We begin by detailing the model, methodology, and magnetic stability of LaFeO${}_3$, followed by determining the transition temperature through analyses of magnetization, the susceptibility and the isothermal entropy change -$\Delta S_m$. Our temperature-dependent magnetization analysis reveals a second order antiferromagnetic to paramagnetic phase transition occurring at 720 K, consistent with previous experimental and theoretical studies. The change of magnetic entropy increases monotonically with applied magnetic field and reaches the values of 0.26 J/kg K and −0.6 J/kg K at 700 K and 720 K, respectively, in an applied field of 0–5 T, with a refrigerant capacity value of 70.04 J/kg and 28.8 J/kg at 700 K and 720 K, respectively. It was found inverse and direct magnetocaloric effect. These findings offer deeper insight into the magnetic behavior of LaFeO${}_3$ and highlight its relevance as a model system for exploring magnetocaloric effects in iron perovskites.