fig2
From: Microstructure and piezoelectric properties of AC poled relaxor-PbTiO3 perovskite single crystals
Figure 2. Cycle number dependence of domain structure, dielectric and piezoelectric properties of relaxor-PT SC. Schematic images of domains in NOP (DEP), DCP, UDP, OPP, OVP I and OVP II stages are shown. PT: PbTiO3; SC: single crystal; NOP: non-polarization; DEP: depolarization; DCP: direct-current poling; UDP: under-polarization; OPP: optimum polarization; OVP: over-polarization.
