Electromechanical properties of high coupling single crystals under large electric drive and uniaxial compression

Author

Amin, Ahmed

Author_Institution

Dept. of Sensors & Sonar Syst., Naval Undersea Warfare Center, Newport, RI, USA

fYear

2004

fDate

23-27 Aug. 2004

Firstpage

64

Lastpage

69

Abstract

This work investigates the 33-mode electromechanical response of relaxor-ferroelectric lead magnesium niobate-lead titanate (PMN-PT) single crystals when driven with large fields ∼ 0.4 MV/m (rms) under a combined dc field and mechanical bias similar to those used in the design of sonar. It demonstrates that the remarkable small signal length extensional coupling (k₃₃>0.90) and other electromechanical properties of morphotropic PMN-PT single crystals prevail under large drive. The observed roll-off of k₃₃ at 42 MPa is analyzed within the framework of recent structural data and the high-order Devonshire theory of possible ferroelectric-ferroelectric transition trajectories.

Keywords

ferroelectric transitions; lead compounds; magnesium compounds; piezoelectricity; relaxor ferroelectrics; 33-mode electromechanical response; 42 MPa; Devonshire theory; PMN-PbTiO₃; PbMgO3NbO3-PbTiO3; electric drive; electromechanical properties; ferroelectric-ferroelectric transition; k₃₃ roll-off; mechanical bias; morphotropic single crystals; relaxor-ferroelectric lead magnesium niobate-lead titanate; small signal length extensional coupling; sonar; uniaxial compression; Bandwidth; Capacitive sensors; Ceramics; Crystals; Ferroelectric materials; Frequency; Niobium; Piezoelectric transducers; Sonar detection; Titanium compounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2004. ISAF-04. 2004 14th IEEE International Symposium on

ISSN

1099-4734

Print_ISBN

0-7803-8410-5

Type

conf

DOI

10.1109/ISAF.2004.1418338

Filename

1418338