Fig. 2: Ferroelectric polarization mapping.
From: Precise structure and polarization determination of Hf0.5Zr0.5O2 with electron ptychography
a Projected MEP phase image of a FE grain along [010] direction with displacement arrows overlapped. b Statistical histogram of polarization displacements in O phase HZO grains. The fit curves represent Gaussian fitting. c Projected MEP phase image from a FE-AFE mixed grain with displacement arrows overlapped. Inset represents enlarged region of polarization mapping. The blue and red arrows in (a) and (c) indicate the direction of polarization in each polar layer. d The displacement magnitude map corresponding to (c). e The mean polarization of every polar layer extracted from yellow dashed-line region in (c). f Displacement distributions from the edge (red, three outermost layers of the grain) and interior (blue, the rest center part of the grain excluding the edge) of grain shown in c. The red arrow indicates the polarization suppression near the grain boundaries.
