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

Abstract

A study on temperature dependent magnetic properties of single phase orthorhombic perovskites system associated with space group Pbnm compounds Pr1-x(Gd/Nd)xMnO3 (x=0.3, 0.5, 0.7) was carried out. A magnetization reversal is observed below the Neel temperature (TN), 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 50K 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.