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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
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 | ||||||||
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| 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: |
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| 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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