Full text loading...
(a) PFM image and (b) piezoresponse hysteresis loop obtained on bare surface of the PZT20/80 film. The bright and dark areas in (a) are poled by dc biases of and −10 V, respectively.
(a) PFM amplitude and (b) phase images of the PZT60/40 film after dc poling. Large bright and dark areas in (b) are poled by dc biases of and −10 V, respectively.
Piezoresponse images of the PZT52/48 film showing domain structures after (a) −15 V and (b) dc poling, respectively. Local piezoresponse hysteresis loops were obtained in (c) inversely poled grains and (d) in the normally switched region.
[(a), (c), and (e)] PFM amplitude and [(b), (d), and (f)] phase images of the PZT52/48 capacitor acquired through the top electrode after application of [(a) and (b)] −5 V and [(c) and (d)] poling field. (e) Piezoresponse amplitude and (f) phase images of the same film area obtained while applying dc bias after poling. Local PFM amplitude and phase hysteresis loops were measured in the PZT52/48 capacitor in normally (g) switching areas and (h) areas exhibiting abnormal switching. Note inversion of phase loops in (g) and (h).
Article metrics loading...