Dielectric and frequency-dependent transport properties of lanthanum-doped bismuth ferrite

Journal of Advanced Dielectrics

S. K. Satpathy¹  Banarji Behera²  A. K. Sahu² 

[1] Centurion University of Technology and Management, Odisha, India;School of Physics, Sambalpur University, JyotiVihar, Burla 768019, Odisha, India;

关键词: Solid state reaction;    XRD;    impedance;    electrical conductivity;   

DOI  :  10.1142/S2010135X19500310

来源: DOAJ

【 摘 要 】

Polycrystalline samples of Bi1−xLaxFeO3 [x=0.5, 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 (100Hz–104Hz) 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.

【 授权许可】

Unknown