An overview of the recent developments in the structural correlation of magnetic and electrical properties of Pr2NiMnO6 double perovskite

Double perovskites R₂NiMnO₆ (R = Rare earth element) (RNMO) are a significant class of materials owing to their varied tunability of the magnetic and electrical properties with the structural modifications. Pr₂NiMnO₆ (PNMO) is one of the least explored members of this series, which shows spin-phonon coupling, magnetocaloric effect and electrochemical performance for various applications such as spintronics, magnetocaloric refrigerant and solid oxide fuel cells. Most of the studies in PNMO are limited to the application domain and focus on the comparative study with different rare earth elements. Detailed structural studies like neutron diffraction are sparse in PNMO samples which will give a perception of the A/B-site cationic (Pr/Ni/Mn-site cationic) ordering in the compound that strongly depends on the physical and chemical properties. This review article goes through the various aspects of PNMO materials that have been reported till now and showcases the octahedral distortions and corresponding structural changes and the exchange interactions, which in turn correlate with the magnetic and electrical properties. The comparison study of PNMO with other members of the RNMO (R = Rare earth) family and the relevance of PNMO over other members is also tried to showcase in this article. This review article provides insight into the scope of studies in PNMO material for exploring unexposed properties of the materials in the double perovskite family.