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SAED patterns taken along the (a) , (b) , and (c) zone axes. The reflection exists in all three diffraction patterns, and the reflection (indicated by an arrow) appears in the zone axis only.
The microscopic ferroelectric domains viewing along the beam direction close to (a)  and (c) [0-11] zone axes, respectively. The white dashed line shown in (a) is the trace of the (01-1). CDF images of the (b) and (d) reflections in the selected region (indicated by a white circle) shown in (a) and (c), respectively. Inset in (b): an enlarge image showing the clusters of in-phase tilted domains.
(a) HRTEM image of the ceramic taken along the zone axis. (b) Fourier transform of the HRTEM image. The reflection is indicated by white arrows. (c) Bragg-filtered image of (a) shows the morphology of the nanosized in-phase tilted domains.
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