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Dielectric Permittivity Enhancement in PZT by Light Doping with Gd

Published online by Cambridge University Press:  26 February 2011

Jorge J. Portelles ,
Nelson S Almodovar ,
Juan Fuentes ,
Eduardo Martinez ,
Oscar Raymond ,
Jesus L Heiras  and
Jesus M Siqueiros
Jorge J. Portelles
Affiliation:
[email protected], Universidad de La Habana, Facultad de Fisica, San Lazaro y L, Vedado, La Habana 10400, Cuba
Nelson S Almodovar
Affiliation:
[email protected], Universidad de La Habana, Facultad de Fisica, San Lazaro y L, Vedado, La Habana, 10400, Cuba
Juan Fuentes
Affiliation:
[email protected], Universidad de La Habana, Facultad de Fisica, San Lazaro y L, Vedado, La Habana, 10400, Cuba
Eduardo Martinez
Affiliation:
[email protected], Universidad Nacional Autonoma de Mexico, Centro de Ciencias de la Materia Condensada, Km. 107 Carretera Tijuana-Ensenada, Ensenada, 22860, Mexico
Oscar Raymond
Affiliation:
[email protected], Universidad Nacional Autonoma de Mexico, Centro de Ciencias de la Materia Condensada, Km. 107 Carretera Tijuana-Ensenada, Ensenada, 22860, Mexico
Jesus L Heiras
Affiliation:
[email protected], Universidad Nacional Autonoma de Mexico, Centro de Ciencias de la Materia Condensada, Km. 107 Carretera Tijuana-Ensenada, Ensenada, 22860, Mexico
Jesus M Siqueiros
Affiliation:
[email protected], Universidad Nacional Autonoma de Mexico, Centro de Ciencias de la Materia Condensada, Km. 107 Carretera Tijuana-Ensenada, Ensenada, 22860, Mexico
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Abstract

PbZr0.53Ti0.4703 doped with 0.6% at. of Gd2O3 has been produced following the traditional solid state reaction technique. The ferro-paraelectric transition temperature is reduced from 386 °C to 352 °C. Remnant polarization and coercive field measurements were made from the hysteresis loops obtained at 23 °C and at different applied electric fields up to a maximum of 17 kV/cm. Piezoelectric performance was studied in the 4 Hz to 4 MHz frequency range at 25 °C and the radial electromechanical coupling factor was determined. A detailed electrical conductivity study in the 30-450 °C temperature range is performed in a wide frequency interval. The different participating transport mechanisms are elucidated and the corresponding activation energies were determined by fitting the experimental data. In particular, in the 30 to 300 °C temperature interval, the ac conductivity follows Jonscher universal relaxation law.

Keywords

dielectric propertiesferroelectricitypiezoelectric
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 966: Symposium T – Ferroelectrics and Multiferroics , 2006 , 0966-T10-04
Copyright
Copyright © Materials Research Society 2007

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References

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