Abstract

 
 
 Single phase nano crystalline powder of La0.75Ba0.25Fe1-xCoxO3 for x ranging from 0.0-0.3 has been prepared using sol-gel method. For dielectric measurements, a steep decrease in the dielectric constant and dielectric has been observed in low frequency region, which tends to show no change at high frequency suggesting a usual dielectric dispersion. The observed dielectric dispersion behavior is directly related to the dipole moments produced due to mobility of localized charge carriers. The impedance measurements are used to show the grain boundary effects. Cole-Cole plot and frequency dependent conductivity measurements clearly demonstrate the conductive behavior of the ceramics.
 
 
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