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X-ray white beam topography of self-organized domains in flux-grown BaTiO3 single crystals

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Walker, David, Glazer, A. M. (Anthony Michael), Gorfman, S., Baruchel, J., Pernot, P., Kluender, R. T., Masiello, F., DeVreugd, C. and Thomas, Pam A. (2016) X-ray white beam topography of self-organized domains in flux-grown BaTiO3 single crystals. Physical Review B (Condensed Matter and Materials Physics), 94 (2). 024110. doi:10.1103/PhysRevB.94.024110

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Official URL: http://dx.doi.org/10.1103/PhysRevB.94.024110

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Abstract

The phenomenon of self-organization of domains into a “square-net pattern” in single-crystal, flux-grown BaTiO3 several degrees below the ferroelectric to paraelectric phase transition was investigated using in situ synchrotron x-ray topography. The tetragonal distortion of the crystal was determined by measuring the angular separation between the diffraction images received from 90° a and c domains in the projection topographs, and shows a rapid decrease towards 110 °C, the onset temperature for self-organization. The onset of self-organization is accompanied by bending of the {100} lattice planes parallel to the crystal surface, which produces a strain that persists up to and beyond the Curie temperature, where the crystal becomes cubic and the self-organized domains disappear. At the Curie point, the bending angle α100=8.1(±0.3)mrad is at a maximum and corresponds to the radius of curvature of the surface being 16.3(±0.6) mm.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Crystallography, Ferroelectric crystals, Curie temperature
Journal or Publication Title: Physical Review B (Condensed Matter and Materials Physics)
Publisher: American Physical Society
ISSN: 1098-0121
Official Date: 12 July 2016
Dates:
DateEvent
12 July 2016Published
1 June 2016Accepted
19 February 2016Submitted
Volume: 94
Number: 2
Article Number: 024110
DOI: 10.1103/PhysRevB.94.024110
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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