SYNTHESIS AND CHARACTERIZATION OF DOUBLE PEROVSKITE, LA2NIMN06 BY SOLID STSTE METHOD

Abstract

Perovskites exhibit several interesting chemical and physical properties. They can have electronic structures ranging from insulating to metallic and even half metallic with spin-polarized electrical conductivity. They have magnetic orderings ranging from antiferromagnetic to ferri- and ferromagnetic. One such interesting double perovskite which show Multiferroic property is La2NiMnO6. In this work, double perovskite La2NiMnO6 samples are prepared by solid state method by three stage thermal treatment. X-ray diffraction confirms the phase purity of La2NiMnO6 as well as the crystal structure. The samples are crystallized in monoclinic structure with space group P21/n. The composition, morphology and structural identity of the sample have been characterized by Scanning Electron Microscope (SEM), X-ray Diffraction (XRD) and Energy-Dispersive X-ray spectroscopy (EDX). Temperature dependent dielectric measurement of the sample in the frequency range 1 kHz to 1 MHz shows step like decrease in dielectric constant at lower temperature, and loss tangent show corresponding relaxation peak. Activation energy of the sample is calculated to understand the potential barrier for a reaction.