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Planar electrode piezoelectric force microscopy to study electric polarization switching in
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Schematic of planar electrode piezoelectric force microscopy setup. Epitaxial electrodes embedded in the film plane supply an alternating electric field that excites a piezoresponse in the , providing three-dimensional information about the local ferroelectric polarization direction.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Piezoresponse (PR) map showing that positive and negative polarization vectors produce dark and bright tones, respectively, in the OP-PR image. Positioning the cantilever along a direction of maximizes contrast in the IP-PR image. Buckling of the cantilever produces a small contrast in the OP-PR images to distinguish the degenerate IP-PR tones of and . (b) Topography, (c) OP-PR, and (d) IP-PR from a PE-PFM scan of between coplanar electrodes.

Image of FIG. 3.
FIG. 3.

(Color online) Growth of a polarization-switched region (circled) from one electrode toward the other as the field strength is increased. Small OP-PR images are set above the larger IP-PR images.

Image of FIG. 4.
FIG. 4.

(Color online) Evolution of 71° domain walls rotating as a function of poling time and bias polarity; the cartoon shows the observed polarization variants and domain. The scanning electron micrograph of the surrounding region shows that PE-PFM images were captured in a nonuniform field; field lines are depicted schematically.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Planar electrode piezoelectric force microscopy to study electric polarization switching in BiFeO3