Effect of Gd/Nd doping on the magnetic properties of PrMnO₃

A study on temperature dependent magnetic properties of single-phase orthorhombic perovskites system associated with space group Pbnm compounds Pr_1−x(Gd/Nd)_xMnO₃ (x = 0.3, 0.5, 0.7) was carried out. A magnetization reversal is observed below the Néel temperature (T_N), in dc magnetization measurements (at 50 Oe) in the doped compounds. This may be due to the antiparallel coupling between the two magnetic sublattices (|Pr + Gd/Nd|and Mn). With lowering of temperature, the |Pr + Gd/Nd| ions begin to polarize under the negative internal field due to canted moment of Mn moments. The hysteresis plot taken at 50 K shows a ferrimagnetic characteristic and the presence of spin canting of ions in the magnetic sublattices. Arrott plot indicates field induced second-order paramagnetic to ferrimagnetic (PM–FiM) phase transition in this system. (paper)