Room-temperature nonlinear dielectric constants and dielectric tunability in poled Pb(Mg1/3Nb2/3)O3-Pbtio3 single crystals

Chew, K.H. and Luo, H.S. and Zhao, X.Y. and Wang, J. and Chan, W.L.H. and Choy, C.L. (2003) Room-temperature nonlinear dielectric constants and dielectric tunability in poled Pb(Mg1/3Nb2/3)O3-Pbtio3 single crystals. Chinese Physics Letters, 20 (7). pp. 1131-1133. ISSN 0256307X

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Abstract

The room-temperature second-, third- and fourth-order nonlinear dielectric constants of poled (1-x)Pb(Mg1/3Nb2/3) O3-xPbTiO3 single crystals were determined by measuring the dielectric response at a frequency of 10 kHz and under a dc bias of 0-1000 V/mm. Tunability of the apparent dielectric constant εr was also defined and examined. The results show the phase structure, domain state, composition and orientation dependences of the dielectric nonlinearity and tunability. It is also shown that the 〈011〉-poled monodomain orthorhombic ferro-electric 0.67 Pb(Mg1/3Nb2/3)O3-0.33 PbTiO3 single crystal has the largest nonlinear dielectric constants and the highest tunability of εr in the monodomain crystals. It could be a most promising candidate for applications where a high dielectric nonlinearity is needed.

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Miss Malisa Diana
Date Deposited: 02 Aug 2013 01:40
Last Modified: 27 Feb 2015 01:15
URI: http://eprints.um.edu.my/id/eprint/8208

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