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Effect of Nd+3 and K+ Substitutions on Phase Transition of Ferroelectric lead Germanate Single Crystals

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IJCA Proceedings on International Conference on Benchmarks in Engineering Science and Technology 2012
© 2012 by IJCA Journal
ICBEST - Number 2
Year of Publication: 2012
Authors:
A N Wazalwar
A G Katpatal

A N Wazalwar and A G Katpatal. Article: Effect of Nd+3 and K+ Substitutions on Phase Transition of Ferroelectric lead Germanate Single Crystals. IJCA Proceedings on International Conference on Benchmarks in Engineering Science and Technology 2012 ICBEST(2):23-26, October 2012. Full text available. BibTeX

@article{key:article,
	author = {A N Wazalwar and A G Katpatal},
	title = {Article: Effect of Nd+3 and K+ Substitutions on Phase Transition of Ferroelectric lead Germanate Single Crystals},
	journal = {IJCA Proceedings on International Conference on Benchmarks in Engineering Science and Technology 2012},
	year = {2012},
	volume = {ICBEST},
	number = {2},
	pages = {23-26},
	month = {October},
	note = {Full text available}
}

Abstract

Double doped (Nd+3 + K+) ferroelectric lead germanate single crystals were grown by controlled cooling of melt. Greenish tinge crystals of 5 x 4 x 3 mm3 were found embedded in the solid. Pure lead germanate was grown by cz technique for comparative analysis. Dielectric constant and loss tangent of pure crystals showed a sharp dielectric peak at 179°C while dielectric constant of doped crystals showed temperature dependence with diffuse dielectric maxima at 350°C. Results suggest a significant positive shift of ferroelectric transition temperature by 171°C. Mechanisms for the shift in transition temperature and diffuse nature of dielectric maxima are discussed.

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