Piezoelectric Effect and Electrostriction in Ceramic Ferroelectrics

• Published in: Ferroelectrics Vol. 359; no. 1; pp. 111 - 116
• Main Authors: Turik, A. V., Yesis, A. A., Reznitchenko, L. A.
• Format: Journal Article
• Language: English
• Published: Taylor & Francis Group 19-11-2007
• Subjects: 77.22.Ch; 77.22.Ej; 77.84.Dy; domain and cluster switching; electrostriction; Ferroelectric ceramics; nonlinear systems; piezoelectric effect
• ISSN: 0015-0193; 1563-5112
• DOI: 10.1080/00150190701515808

The longitudinal strains ξ
3
of soft relaxor ferroelectric ceramics PbMg
1/3
Nb
2/3
O
3
-PbTiO
3
(PMN-PT) were measured as a function of the electric field strength E
3
. The electric field dependences of longitudinal differential piezoelectric coefficients d
33
(E
3
) and electrostriction coefficients M
33
(E) were measured from the virgin ξ
3
(E
3
) curves and hysteresis loop branches. It was shown that taking into account the polarization nonlinearity (that is, the E
3
dependence of dielectric susceptibility) leads to nonmonotonic electric field dependences d
33
(E
3
) and M
33
(E
3
). The large magnitude of the dielectric susceptibility of relaxor ferroelectric ceramics is responsible for the giant electrostriction being positive in low electric fields and negative in strong ones.