Fig. 1. Experimental set-up for high voltage electrical experiments.
Fig. 2. Schematic of the experimental set-up for PFM.
Fig. 3. Compatible non-180° and 180° domain wall in tetragonal and rhombohedral phases.
Fig. 4. Electric displacement versus electric field during five poling steps.
Fig. 5. (a) AFM topography image, and (b) EBSD image quality map of the identical region in the PZT sample. (c)~(h) A series of PFM images acquired during a step-wise poling process.
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