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Effect of lanthanum doping on electrical and electromechanical properties of Ba1–𝑥La𝑥TiO3
M Aparna T Bhimasankaram S V Suryanarayana G Prasad G S Kumar
Electrical Properties Volume 24 Issue 5 October 2001 pp 497-504
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https://www.ias.ac.in/article/fulltext/boms/024/05/0497-0504 -
Keywords
Ferroelectric ;resonant frequency ;anti-resonant frequency ;vector admittance plots. -
Abstract
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, 𝑇c 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–𝑥La𝑥TiO3 with 𝑥 = 0.003 were found to be much larger than that of pure barium titanate.
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Author Affiliations
M Aparna1 T Bhimasankaram1 S V Suryanarayana1 G Prasad1 G S Kumar1
- Department of Physics, Osmania University, Hyderabad 500 007, India
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Dates
- Published
- October 2001
- Manuscript received
- 10 January 2001
- Manuscript revised
- 20 June 2001
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