Sintering temperature effect on the magnetic interactions in Pr0.67Sr0.33MnO3 manganite

In this work, we report the effect of sintering temperature ( T S ) on the magnetic interactions and the critical behavior of Pr 0.67 Sr 0.33 MnO 3 manganite prepared via sol–gel method (700 °C ≤ T S ≤ 1200 °C). The critical exponents study revealed that the 3D-Ising model is the best model to describe the magnetic interactions in the P1000 ( T S = 1000 °C) and P1200 ( T S = 1000 °C) samples. Consequently, a strong magnetic anisotropy characterizes these samples near the paramagnetic-ferromagnetic transition temperature, such anisotropy can be linked to the magnetic moment of Pr 3+ ions ( µ = 3.58 µ B ). For T S ≤ 850 °C, it becomes nearly impossible to speak about universality class due to the presence of great magnetic disorder induced by several factors like spin disordered shell in nanoparticles, magnetic frustration and Griffiths phase. Highlights Pr 0.67 Sr 0.33 MnO 3 manganite was prepared by sol–gel route with different sintering temperature (T s ) values. 3D-Ising model can describe the magnetic behavior for T s > 850 °C. The critical analysis for nanosized specimens is not possible due to the spin disorder.