Double perovskite Nd2FeTiO6 ceramics: Structural and electrical properties

Abstract

Because of their high stability, innocuous behaviour, outstanding electric properties and multi-functionality, lead-free double perovskites have emerged as a promising alternative to lead-based perovskites. We present here the structural, microstructural, dielectric and electrical properties of a newly synthesized double perovskite Nd2FeTiO6 (NFTO). The Rietveld refinement of its X-ray diffraction pattern revealed a monoclinic structure with space group P121/c1. The oxide exhibits a temperature-independent dielectric constant and di-electric loss at low temperatures (below 200 ?C) making the compound a suitable candidate for fabricating thermally stable capacitors. The AC conductivity was investigated using the Jonscher?s universal power law, and it was inferred that the conduction process is caused by the Correlated BarrierHopping (CBH) mechanism. Furthermore, frequency dependent AC conductivity also revealed the NTCR nature of the NFTO compound.