Fig. 1: Imaging the AFE modes in Mn-doped (Na0.65Ag0.20Ca0.15)(Nb0.85Ti0.15)O3 by ADF-STEM. | Nature Communications

Fig. 1: Imaging the AFE modes in Mn-doped (Na0.65Ag0.20Ca0.15)(Nb0.85Ti0.15)O3 by ADF-STEM.

From: Improper antiferroelectricity in NaNbO3-based perovskites driven by antiferrodistortive modulation

Fig. 1

ADF-STEM images projected along [001]p (a), [100]p (b), and [010]p (c) zone axes. The mirror planes (or “tilt-twin boundaries”) are denoted by vertical dashed lines in (a, b). d–f Cation displacement maps with respect to the reference lattices derived from (a–c). Arrows in yellow and cyan show the displacement of A and B cations, respectively, with length scaling with the magnitude. The eigenmodes dominating the cation displacement fields in (d–f) according to group theoretical analysis are overlaid in (a–c). g–i Relative displacement maps of A cations with respect to the four B-cation neighbors derived from (a–c).

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