Conventional synthesis and characterization of cubically ordered La2FeMnO6 double perovskite compound

Abstract The cubically ordered double perovskite compound, La 2 FeMnO 6 , has been synthesized using high temperature solid-state reaction method. Rietveld refinement of powder X-ray diffraction data indicates the formation of La 2 FeMnO 6 compound, having cubic structure with space group Pm-3m . It is also inferred that the LaFeO 3 perovskite structure accommodates the Mn 3+ ions to stabilize the double perovskite La 2 FeMnO 6 structure. The scanning electron micrograph reveals the uniform distribution of crystallites without any segregation. Energy dispersive spectra confirms the presence of La, Fe, Mn and O elements in the prepared compound. The existence of higher order Raman active vibrational modes confirms the phase purity of the prepared sample, where higher-order phonon modes may be related to the strong spin-lattice coupling arising from the interaction between the adjacent magnetic sublattices. The magnetic exchange interactions between transition metal ions influences the anti-ferromagnetic ordering (AFM) existing in the La 2 FeMnO 6 compound. The magnetization measurement confirms the dominant exchange interactions between Fe 3+ and Mn 3+ ions in the material which provides a complex environment for the competition between ferri-magnetism (FIM) and AFM interactions. Hence, a phase pure double perovskite La 2 FeMnO 6 compound prepared at high temperature is characterized for its structural, optical and magnetic properties.