Magnetic, Magnetocaloric and Correlation with Critical Behavior in Pr0.8Sr0.2MnO3 Compound Prepared via Solid-State Reaction

In this study, the critical behavior and magnetic and magnetocaloric properties in a polycrystalline Pr 0.8 Sr 0.2 MnO 3 sample synthesized by solid-state technique were investigated in detail. By analyzing the temperature and the field dependence of magnetization, we have demonstrated that this compound exhibits a clear second-order magnetic phase transition around the Curie temperature estimated at T C = 161 K. Refined values of the critical exponents β , γ and δ determined by the modified Arrott plots, the critical isotherm and Kouvel–Fisher analysis show that our compound is described by the 3D Ising model. The reliability of these critical exponents was further confirmed using the universal scaling hypothesis. Under an applied magnetic field of 5 T, the calculated value of the maximum of the magnetic entropy change is estimated at 1.740 J K −1 kg −1 and the relative cooling power (RCP) turns out to be 134.46 J kg −1 . Moreover, the critical exponents were evaluated from RCP results which confirm the correlation between the critical behavior and magnetocaloric results in the Pr 0.8 Sr 0.2 MnO 3 compound.