Dielectric Behavior and Impedance Spectroscopy of Ba_1-xBi_xTi_1-xFe_xO₃ System

Abstract:

Studies on the analysis of impedance spectroscopy of polycrystalline samples with compositions x ≤ 0.20 in the system Ba1-xBixTi1-xFexO3 are made. For this all the samples are prepared using solid state ceramic route. Preliminary X-ray diffraction patterns showed single phase formation of all compositions with tetragonal symmetry for x = 0.02 and cubic symmetry for compositions with x ≥ 0.10. For composition with x = 0.02, the dielectric anomaly at ~100 °C indicates paraelectric to ferroelectric transition. Impedance spectroscopic studies over the temperature range 25 °C to 180 °C have shown the presence of both bulk and grain boundary effects. The bulk conductivity has exhibited Arrehenius type thermally activated hopping process which is supported by ac conductivity behavior as a function of frequency.

• Periodical: Advanced Materials Research (Volume 585)
• Pages: 190-194
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.585.190
• Online since: November 2012
• Authors: Arvind Kumar, R.K Dwivedi, Vijayeta Pal
• Keywords: Grain Boundary Effect, Impedance, Relaxor Behavior

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