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Tendency to promote ferroelectric distortion in Pr-modified PbTiO3

Kalyani, Ajay Kumar and Garg, Rohini and Ranjan, Rajeev (2009) Tendency to promote ferroelectric distortion in Pr-modified PbTiO3. In: Applied physics letters, 95 (22).

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Abstract

Structural, microstructural, and dielectric studies have been carried out on Pr-modified PbTiO3. A comparative analysis with La-modified PbTiO3 suggests that for chemical modification by same amount, the Pr-modified system has larger tetragonal strain and Curie point. No clear feature of relaxor ferroelectric state is observed for Pr concentration as high as x=0.35, suggesting that Pr modification is less effective, as compared to La-modification, in inducing a relaxor ferroelectric state. Results suggest that inspite of increased chemical disorder, Pr modification partly tends to restore the ferroelectric distortion of the lattice through partial occupancy of the Pr4+ ions on the Ti4+ sites.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to American Institute of Physics.
Keywords: dielectric relaxation; ferroelectric Curie temperature; lead compounds; praseodymium; relaxor ferroelectrics
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 05 Jan 2010 11:13
Last Modified: 19 Sep 2010 05:54
URI: http://eprints.iisc.ernet.in/id/eprint/25348

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