Figure 4. Domain configuration in partially switched states.

Isomeric representation of (a) LPFM and (b) VPFM amplitude images with phase information overlaid. Schematic cantilevers are included illustrating the nature of the cantilever contortion associated with in- and out-of-plane polarization detection: the cantilever torsional twist in (a) registers an in-plane polarization while the vertical deflection in (b) registers an out-of-plane polarization component. The original 2D PFM amplitude images are included below. At first glance (a) implies a simple 180° domain arrangement (hollow arrows indicate relative in-plane polar orientations). However (b) clearly reveals parent a-c-domain stripe structure.