Li, QianLiu, YunWang, JianStuder, Andrew J.Withers, Ray L.Li, ZhenrongXu, Zhuo2015-12-022015-12-020021-8979http://hdl.handle.net/1885/16964We report changes in the metric symmetry of unpoled and electrically poled single crystals of 0.26PbIn₁/₂Nb₁/₂)O₃-0.46Pb(Mg₁/₃Nb₂/₃)O₃-0.28PbTiO₃, as revealed by neutron diffraction in conjunction with electrical measurements. The unpoled crystals show relaxor characteristics and an average rhombohedral symmetry that persists from ambient temperature up to the Curie temperature of ∼165 °C. Poling along a [111] direction enhances the rhombohedral distortion away from cubic metric symmetry but appears not to induce any monoclinic phases. By contrast, the poled [001]-oriented crystal has orthorhombic (or monoclinic MC ) metric symmetry at 25 °C. An intermediate transition to a metrically tetragonal phase around 120 °C is confirmed for both poled crystals.Q.L., Y.L., and R.L.W. acknowledge the support of the Australian Research Council (ARC) in the form of ARC Discovery Grants. Y.L. also acknowledges support from the ARC Future Fellowships Program.http://www.sherpa.ac.uk/romeo/issn/0021-8979..."Publishers version/PDF may be used on author's personal website, institutional website or institutional repository" from SHERPA/RoMEO site (as at 2/12/15). Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics and may be found at https://doi.org/10.1063/1.4802669Keywords: Electrical characterization; Electrical measurement; Monoclinic phasis; Oriented crystals; Relaxor characteristics; Rhombohedral distortion; Rhombohedral symmetry; Structural transitions; Lead; Neutron diffraction; Single crystals; Crystal symmetry2013-04-1910.1063/1.48026692016-02-24