Open AccessDielectric and frequency-dependent transport properties of lanthanum-doped bismuth ferrite
Author(s) -
Anurag Sahu,
S. K. Satpathy,
Banarji Behera
Publication year - 2019
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x19500310
Subject(s) - dielectric , arrhenius equation , condensed matter physics , conductivity , thermal conduction , materials science , temperature coefficient , electrical resistivity and conductivity , analytical chemistry (journal) , lanthanum , ferrite (magnet) , power law , activation energy , doping , crystallite , chemistry , physics , inorganic chemistry , mathematics , optoelectronics , statistics , chromatography , quantum mechanics , metallurgy , composite material
Polycrystalline samples of Bi[Formula: see text]La x FeO 3 [[Formula: see text], 0.6, 0.7 and 0.8] were synthesized through high temperature solid state reaction method. The structural studies of the compounds were done using X-ray diffraction technique. Dielectric constant and dielectric loss were studied for various frequencies (100[Formula: see text]Hz–10 4 [Formula: see text]Hz) at different temperatures. The temperature-dependent non-Debye type relaxation process was suggested in the materials from the analysis of frequency-dependent electrical data at different temperatures. Temperature dependence of dc and ac conductivity at various frequencies showed negative temperature coefficient of resistance (NTCR) behavior. The frequency dependence of ac conductivity at different temperatures obeyed Jonscher’s universal power law. The temperature dependence of dc and ac conductivity was fitted to Arrhenius equation. The activation energies at different temperature ranges were calculated to know the charge species involved in the conduction process.