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.

PDF full.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

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
Publication:	Journal of Physics:Condensed Matter
Publisher:	Institute of Physics
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.ac.in/id/eprint/17476

Actions (login required)

View Item