Figure 5

Piezoresponse force microscopy characterization.

Piezoresponse phase (a) and piezoresponse amplitude (b) versus applied voltage loops, measured with an AC driving voltage Vac = 1 V. Piezoresponse phase (c) and piezoresponse amplitude (d) images recorded at Vac = 1 V, after poling with +6 V and −6 V. Scale bar corresponds to 4 μm.