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A rapid two‐dimensional data collection system for the study of ferroelectric materials under external applied electric fields
Author(s) -
Vergentev Tikhon,
Bronwald Iurii,
Chernyshov Dmitry,
Gorfman Semen,
Ryding Stephanie H. M.,
Thompson Paul,
Cernik Robert J.
Publication year - 2016
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576716011341
Subject(s) - reciprocal lattice , detector , ferroelectricity , optics , electric field , diffraction , monoclinic crystal system , beamline , materials science , bragg peak , physics , phase (matter) , crystallography , crystal structure , chemistry , optoelectronics , dielectric , beam (structure) , quantum mechanics
Synchrotron X‐rays on the Swiss Norwegian Beamline and BM28 (XMaS) at the ESRF have been used to record the diffraction response of the PMN–PT relaxor piezoelectric 67% Pb(Mg 1/3 Nb 2/3 )O 3 –33% PbTiO 3 as a function of externally applied electric field. A DC field in the range 0–18 kV cm −1 was applied along the [001] pseudo‐cubic direction using a specially designed sample cell for in situ single‐crystal diffraction experiments. The cell allowed data to be collected on a Pilatus 2M area detector in a large volume of reciprocal space using transmission geometry. The data showed good agreement with a twinned single‐phase monoclinic structure model. The results from the area detector were compared with previous Bragg peak mapping using variable electric fields and a single detector where the structural model was ambiguous. The coverage of a significantly larger section of reciprocal space facilitated by the area detector allowed precise phase analysis.