Piezoresponse signals

Figure 12.3 depicts the piezoresponse signal (red curve) and the sample topography (black curve) taken across the wedged sample. Note the different sample regions deduced from the topography profile. From left to right, they are the pzt native surface, the polished pzt... 

Fig. 52a-c Triangular voltage variation for a in-field b remanent loops. Grey bars in b represent the measurement interval where the PFM signal is recorded (100 ms in this experiment) c the resulting in-field loops (straight line) and remanent loops (dotted line) are shown. The pulse length for the remanent loop was 750 ms and piezoresponse was measured with 2 V at 90 kHz in both cases... 

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