The test pattern for Piezoresponse Force Microscopy (PFM) is intended for setting of PFM mode, optimization of the modulation voltage parameters (frequency, phase, amplitude), and test measurements in PFM mode.
Lithium niobate (LiNbO3) single-crystalline 500 µm thick plate with roughness less than 10 nm cut normal to the polar axis. A regular domain structure with period D was created in the sample. The spontaneous polarization has the opposite direction in the neighboring domains. The polarization direction determines the sign of piezoelectric coefficient. Analysis of the local piezoelectric response during application of the modulation voltage allows to reveal the domain pattern.