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Structure and phase transition of the (1-x)PbTiO3-(x)BiAlO3 system

Ranjan, Rajeev and Kalyani, Ajay Kumar and Garg, Rohini and Krishna, PSR (2009) Structure and phase transition of the (1-x)PbTiO3-(x)BiAlO3 system. In: Solid State Communications, 149 (45-46). pp. 2098-2101.

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The system (1 - x)PbTiO3 - (x)BiAlO3 has been studied with regard to its structure and phase transition behaviour using x-ray, neutron and dielectric measurements. The structure is tetragonal within the solid solubility limit (x < 0.25). Interatomic distance analysis revealed that the Pb-O bond lengths remain unaffected and the only the Ti-O lengths are altered by BiAlO3 substitution. The results are suggestive of a crossover from and A-site & B site driven ferroelectric system for x = 0 to a dominant A-site driven ferroelectric system for higher x. This cross-over is brought about by (i) a reduction in the contribution to the ferroelectric stability from B-site cations due to dilution of the Ti-sublattice by Al and (ii) a reinforcement to the stability of the ferroelectric state by the A-site cations by the Bi+3 cations..

Item Type: Journal Article
Publication: Solid State Communications
Publisher: Elsevier Science
Additional Information: Copyright for this article belongs to Elsevier Science.
Keywords: Perovskite; Ferroelectrics; Powder diffraction
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 27 Nov 2009 12:06
Last Modified: 19 Sep 2010 05:52
URI: http://eprints.iisc.ac.in/id/eprint/25003

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