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Structure and phase transition of Na0.5La0.5TiO3

Garg, Rohini and Senyshyn, Anatoliy and Boysen, Hans and Ranjan, Rajeev (2008) Structure and phase transition of Na0.5La0.5TiO3. In: Journal of Physics:Condensed Matter, 20 (50). pp. 505215-1.

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Official URL: http://www.iop.org/EJ/abstract/0953-8984/20/50/505...

Abstract

A temperature dependent neutron powder diffraction study was carried out on Na0.5La0.5TiO3 (NLT) from 298 K up to 1373 K. Rietveld analysis using high resolution x-ray and neutron powder diffraction data confirmed the rhombohedral structure (space group R\bar {3}c ) of this compound. The rhombohedral phase transforms to cubic (Pm\bar {3}m ) above 873 K. The temperature variation of the tilt angle, a continuous change of the specific volume across the transition, and the strain analysis suggest a second order nature of the cubic–rhombohedral phase transition, which is in conformity with the group theoretical prediction based on symmetry considerations.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Institute of Physics.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 24 Jul 2009 08:49
Last Modified: 19 Sep 2010 04:57
URI: http://eprints.iisc.ernet.in/id/eprint/17476

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