Journal
BULLETIN OF MATERIALS SCIENCE
Volume 24, Issue 5, Pages 497-504Publisher
INDIAN ACAD SCIENCES
DOI: 10.1007/BF02706721
Keywords
ferroelectric; resonant frequency; anti-resonant frequency; vector admittance plots
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The effect of lanthanum doping is studied on ferroelectric properties of Ba1-xLaxTiO3 with x = 0.0005, 0.001, 0.003 prepared through solid state sintering route. Dielectric and impedance spectroscopic studies have been carried out. The tetragonal distortion of the unit cell decreased and ferroelectric transition temperature, T-c increased with the increase of lanthanum content. Combined impedance and admittance spectroscopy was used to analyse impedance data. The electromechanical parameters were calculated from the resonant and anti-resonant frequencies from vector admittance plots. The electromechanical coefficients for Ba1-xLaTiO3 with x = 0.003 were found to be much larger than that of pure barium titanate.
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