fig4
From: Microstructure and piezoelectric properties of AC poled relaxor-PbTiO3 perovskite single crystals
Figure 4. (A) poling wave forms; (B) DEP SEM image; (C) OPP-DCP SEM image; (D) OPP-ACP SEM image. DEP: Depolarization; SEM: scanning electron microscopy; OPP: optimum polarization; DCP: direct-current poling; ACP: alternating-current poling.
