International Conference on Benchmarks in Engineering Science and Technology 2012 |
Foundation of Computer Science USA |
ICBEST - Number 2 |
October 2012 |
Authors: A N Wazalwar, A G Katpatal |
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A N Wazalwar, A G Katpatal . Effect of Nd+3 and K+ Substitutions on Phase Transition of Ferroelectric lead Germanate Single Crystals. International Conference on Benchmarks in Engineering Science and Technology 2012. ICBEST, 2 (October 2012), 23-26.
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.