Abstract
Domain wall structures on the etched surfaces of the solid solutions of Pb(Zn1/3Nb2/3)O3-xPbTiO3 (PZN-xPT; x=8%, 20%) were investigated by atomic force microscopy (AFM). Ferroelectric and ferroelastic domain wall structures were observed. In the rhombohedral phase, a zigzag domain wall structure was found. We showed that all of the ferroelastic domain wall structures observed in the tetragonal and rhombohedral phases can be explained by the Sapriel theory, and concluded that no ferroelectric charged domain wall exists in the PZN-PT crystal without an external field. The symmetry of PZN-8%PT at room temperature is rhombohedral.
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