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(a) Polarization hysteresis loops measured in the SBT film using the Pt top electrode. Schematics of the polarization switching process in the macroscopic hysteresis loop measurements (b) and in the PFM experiment (c).
Surface topography (a), vertical (b), and lateral (c) PFM signal of SBT thin film.
Vertical (a) and lateral (b) piezoelectric hysteresis loops for grains in Fig. 2. For clarity, vertical loops are shown only for grains 1, 2, and 3.
(a) Corrected hysteresis loop and corresponding fit by Eq. (3) for positive and negative tip biases. (b) Correlation between maximal switchable polarization and coercive voltage .
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