Structure of the noncubic phase in the ferroelectric state of Pr-substituted SrTiO3

Garg, Rohini and Senyshyn, Anatoliy and Boysen, Hans and Ranjan, Rajeev (2009) Structure of the noncubic phase in the ferroelectric state of Pr-substituted SrTiO3. In: Physical Review B, 79 (14).

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Abstract

Sr1−xPrxTiO3 has recently been shown to exhibit ferroelectricity at room temperature. In this paper powder x-ray and neutron-diffraction patterns of this system at room temperature have been analyzed to show that the system exhibits cubic (Pm-3m) structure for x<=0.05 and tetragonal (I4/mcm) for x>0.05. The redundancy of the noncentrosymmetric structural model (I4cm) in the ferroelectric state suggests the absence of long-range ordered ferroelectric domains and supports the relaxor ferroelectric model for this system.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	The American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Keywords:	crystal structure, neutron diffraction, relaxor ferroelectrics, strontium compounds, X-ray diffraction
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	09 Dec 2009 10:10
Last Modified:	19 Sep 2010 05:33
URI:	http://eprints.iisc.ac.in/id/eprint/20542

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