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Content available remote Electrical conduction in Ba(Bi0.5Nb0.5)O3 ceramics. Impedance spectroscopy analysis
Prasad K., Bhagat S., Amarnath K., Choudhary S. N., Yadav K. L.
Materials Science Poland
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2010
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Vol. 28, No. 1
317--325
EN
A new lead free perovskite ceramics Ba(Bi0.5Nb0.5)O3 was fabricated by a conventional ceramic technique at 1185 °C and subsequent sintering at 1200 °C in air atmosphere. The XRD analysis of Ba(Bi0.5Nb0.5)O3 powder indicated the formation of a single-phase monoclinic structure. The ac conductivity data were found to obey the power law and showed a negative temperature coefficient for the resistance behaviour. The ac conductivity values were used to evaluate the density of states at the Fermi level, minimum hopping length and activation energy of the compound. The correlated barrier hopping model was found to successfully explain the mechanism of charge transport in Ba(Bi0.5Nb0.5)O3.
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