Origin of the high piezoelectric response in PbZr1-xTixO3
High resolution x-ray powder diffraction measurements on poled PbZr1-xTixO3 (PZT) ceramic samples close to the rhombohedral-tetragonal phase boundary (the so-called morphotropic phase boundary) have shown that for both rhombohedral and tetragonal compositions the piezoelectric elongation of the unit cell does not occur along the polar directions but along those directions associated with the monoclinic distortion. This work provides the first direct evidence for the origin of the very high piezoelectricity in PZT.
Guo
R
Materials Research Laboratory, Pennsylvania State University, University Park, Pennsylvania 16802-4800, USA.
Cross
LE
Park
SE
Noheda
B
Cox
DE
Shirane
G