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correspondence Nanoscale phase separation in perovskites revisited To the Editor — Crystal structure two-dimensionally modulated structure Later, using transmission electron determination becomes particularly complex of (Nd Li )TiO perovskites. However, microscopy (TEM), Guiton and Davies 2/3–x 3x 3 when competing interactions cause intricate our experimental study evidences an identified two types of periodic pattern: a modulated structures. A striking example is unfortunate misinterpretation of some of rectangular chessboard pattern with {100} given by the incommensurately modulated the electron microscopy data . domain boundaries and a diamond-type perovskites at ferroelectric–antiferroelectric e f Th ull complexity of the pattern with {110} boundaries. As both morphotropic phase boundaries, which (Nd Li )TiO materials was first noticed patterns appear in the same material, yet 2/3–x 3x 3 arise due to a competition between by García-Martín et al. who showed that under different imaging conditions, one octahedral tilting distortions and polar electron diffraction (ED) reveals satellites pattern should ree fl ct diffraction contrast 1,2 cation displacements . Extra complexity is decorating the main ree fl ctions of the due to a periodically modulated strain expected when the displacement modulation a × a × 2a layered perovskite structure el fi d, whereas the other pattern should p p p is
Nature Materials – Springer Journals
Published: Feb 20, 2014
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