Multifunctional characterization of Ca-modified new double perovskite for energy harvesting devices

Abstract

The conventional solid-state route method was adopted for the synthesis of the double perovskite Ba1.5Ca0.5FeVO6. The well define spikes that appear in the XRD profile of the investigated sample suggested the formation of a single-phase new compound. The structural refinement carried out through POWD and MAUD software suggested the material crystallize in the monoclinic phase having a space group of P21/m. The morphological investigation of the sample was carried out by field emission scanning electron micrograph (FESEM). The involvement of different vibrational modes such as stretching, bending, etc. as well as functional groups associated with the compounds was studied through Raman and Fourier transform infrared (FTIR) spectroscopic techniques. The electronic configuration and chemical valence state of the involved elements were investigated by incorporating X-ray photoelectron spectroscopy. The optical sensitivity and bandgap of the material were studied through UV–Visible spectroscopy. The dielectric properties of the material were investigated by monitoring the variation of dielectric parameters (dielectric constant and loss tangent) with frequency while non-destructive impedance and modulus techniques were adopted for electrical characterization. Besides, the AC and DC conductivity spectra were studied for a detailed investigation of electrical properties and the type of charge carriers in the material. The identification of ferromagnetism in the material at room temperature was done by M-H loop.