Study of incommensurate phases in lanthanum-doped zirconium-rich lead zirconate titanate ceramics

Villaurrutia, R., MacLaren, I. and Peláiz-Barranco, A. (2010) Study of incommensurate phases in lanthanum-doped zirconium-rich lead zirconate titanate ceramics. Journal of Physics: Conference Series, 241(1), 012038. (doi:10.1088/1742-6596/241/1/012038)

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Abstract

The microstructure and nanostructure of zirconium-rich Pb(Zr,Ti)O(3) ceramics doped with small amounts of La which are right at transition between the ferroelectric (FE) and antiferroelectric (AFE) orderings has been examined using Transmission Electron Microscopy (TEM) imaging and diffraction. In this region, the La doping frustrates the formation of simple FE or AFE phases and promotes long period ordered phases (2-3 nm) with ordering along < 110 > with unit cells incommensurate with the primitive cubic unit cell. We show that the domain structure in these materials is closely related to that previously observed in AFE PbZrO(3). Moreover, precision measurements of crystallographic tilts at domain boundaries using Kikuchi diffraction methods also confirms the close relationship to PbZrO(3). The domains also contain a nanostructure perpendicular to the long-period ordering direction, but the reasons for the appearance of this nanostructure remain unclear.

Item Type:Articles
Additional Information:Paper presented at EMAG2009, Sheffield, UK, 8-11 Sept 2009
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:MacLaren, Dr Ian
Authors: Villaurrutia, R., MacLaren, I., and Peláiz-Barranco, A.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of Physics: Conference Series
ISSN:1742-6596

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