Premium
Structural and impedance spectroscopy analysis of Ba(Fe 1/2 Nb 1/2 )O 3 ceramic
Author(s) -
Bhagat S.,
Prasad K.
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925476
Subject(s) - dielectric spectroscopy , crystallite , materials science , dielectric , analytical chemistry (journal) , ceramic , monoclinic crystal system , debye , crystal structure , perovskite (structure) , crystallography , mineralogy , condensed matter physics , chemistry , electrode , electrochemistry , composite material , optoelectronics , physics , metallurgy , chromatography
Lead‐free perovskite Ba(Fe 1/2 Nb 1/2 )O 3 (BFN) was prepared by conventional ceramic fabrication technique at 1200 °C/5 h in air atmosphere. The crystal symmetry, space group, and unit cell dimensions were determined from the experimental results using FullProf software whereas crystallite size and lattice strain were estimated from Williamson–Hall approach. X‐ray diffraction (XRD) analysis of the compound indicated the formation of a single‐phase monoclinic structure with the space group P 2/ m . EDAX and SEM studies were carried out in order to evaluate the quality and purity of the compound. To find a correlation between the response of the real system and idealized model circuit composed of discrete electrical components, the model fittings were presented using the impedance data. Complex impedance analyses suggested the dielectric relaxation to be of non‐Debye type. The correlated barrier hopping (CBH) model was employed to successfully explain the mechanism of charge transport in BFN.