Dielectric dispersion and impedance spectroscopy of yttrium doped BiFeO3-PbTiO3 electronic system

Abstract

The dielectric dispersion and impedance spectroscopy of multiferroic bismuth ferrite (BFO; BiFeO3) and lead titanate (PT; PbTiO3) electro ceramics have been altered by doping chemically with Yttrium (Y3+). The distinctive structural study including morphology as well as electrical properties of Y3+ doped BFO-PT solid composite [(Pb0.9Bi.05Y0.05) (Fe0.1Ti0.9)O3] depicts several interesting results on structure-properties correlation. The development of single phase compound with tetragonal crystal coordination is predicted from X-ray diffraction (XRD). The micrograph substantiates the development of dense grains. The chemical content and composition of the prepared solid solution is determined using the energy dispersive X-ray (EDX) technique. The impedance spectroscopy shows the evidence of grain as well as grain boundary effects leading to the subsistence of negative temperature coefficient of resistance (NTCR) in this processed material. At lower temperature region, the ac conductivity of this compound rises with the frequency. The processed electronic compound illustrates non-Debye type electrical relaxation behaviour. The preliminary study of the prepared electronic material may provide some useful information for devise of electronic components as well as gadget.