Structural, electrical and leakage current behaviour of double perovskite Gd2NiTiO6

This work discusses the synthesis, characterization, and electrical properties of Gd2NiTiO6 (GNTO) double perovskite synthesized using the sol-gel citrate auto-ignition method. The structure, microstructure, and compositional distribution of the sample were analyzed by X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), and Energy Dispersive X-ray (EDX) analysis. Rietveld's refinement of the XRD pattern corroborated the single-phase monoclinic structure with space group P21/n. The impedance spectra demonstrated grain and grain boundary contributions to the total conductivity and the non-Debye type relaxation. The electrical study also established the semiconductive character of the material. The investigation showed that the conduction mechanism was thermally activated. The frequency-dependent complex dielectric spectra have been investigated using the Havriliak-Nigami (HN) formalism. The temperature variation of leakage-current density was found from J-E characteristics curves.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

This study investigates the synthesis, characterization, and electrical properties of Gd2NiTiO6 (GNTO) double perovskite using the sol-gel citrate auto-ignition method. The structure, microstructure, and compositional distribution of the sample were analyzed through X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), and Energy Dispersive X-ray (EDX) analysis. The results confirmed a single-phase monoclinic structure with space group P21/n, and the electrical study revealed the thermally activated conduction mechanism and semiconductive character of the material. The frequency-dependent complex dielectric spectra were investigated using the Havriliak-Nigami (HN) formalism, and the temperature variation of leakage-current density was determined from J-E characteristics curves.