Atomic-scale imaging and quantification of electrical polarisation in incommensurate antiferroelectric lanthanum-doped lead zirconate titanate

MacLaren, I. , Villaurrutia-Arenas, R., Schaffer, B., Houben, L. and Peláiz-Barranco, A. (2012) Atomic-scale imaging and quantification of electrical polarisation in incommensurate antiferroelectric lanthanum-doped lead zirconate titanate. Advanced Functional Materials, 22(2), pp. 261-266. (doi:10.1002/adfm.201101220)

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Publisher's URL: http://dx.doi.org/10.1002/adfm.201101220

Abstract

Lanthanum doping of zirconium rich lead zirconate titanate gives rise to incommensurate, long-period antiferroelectric structures. The structure of two stacking sequences in this incommensurate phase is determined using quantitative analysis of high-resolution scanning transmission electron microscopy images, with the lead atom positions located with an exceptional precision of about 6 pm. This allows the estimation of local polarisation variations across the stacking units, and the polarisation varies in an approximately sinusoidal fashion along the stacking direction. The measured peak Pb atom displacements of about 28 pm and peak polarisation values of about 60 mu C cm-2 match extremely well to reported values for the commensurate antiferroelectric PbZrO3 phase.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Schaffer, Dr Bernhard and Villaurrutia-Arenas, Mr Rafael and MacLaren, Dr Ian
Authors: MacLaren, I., Villaurrutia-Arenas, R., Schaffer, B., Houben, L., and Peláiz-Barranco, A.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Advanced Functional Materials
Publisher:Wiley-VCH Verlag
ISSN:1616-301X
ISSN (Online):1616-3028
Published Online:08 November 2011

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
529141Determining the atomic structure of incommensurate antiferroelectrics based on La-doped Pb(Zr,Ti)O3Ian MacLarenEngineering & Physical Sciences Research Council (EPSRC)EP/H028218/1Physics and Astronomy