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Ferroelectric domain configuration and piezoelectric responses in (001)-oriented PMN-PT films

(1− x)Pb(Mg 1/3Nb 2/3)− xPbTiO 3 ( x=0.3–0.35) ferroelectric thin films were prepared by pulsed laser deposition on (001) single crystal LaAlO 3 substrates coated with YBa 2Cu 3O 7 electrodes. X-ray diffraction (XRD) measurements showed the as-grown lead magnesium niobate (PMN)-lead titanate (PT) fi...

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Bibliographic Details
Published in:Materials characterization 2002-04, Vol.48 (2), p.215-220
Main Authors: Wang, J., Luo, E.Z., Wong, K.H., Chan, H.L.W., Xu, J.B., Wilson, I.H., Choy, C.L.
Format: Article
Language:English
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Summary:(1− x)Pb(Mg 1/3Nb 2/3)− xPbTiO 3 ( x=0.3–0.35) ferroelectric thin films were prepared by pulsed laser deposition on (001) single crystal LaAlO 3 substrates coated with YBa 2Cu 3O 7 electrodes. X-ray diffraction (XRD) measurements showed the as-grown lead magnesium niobate (PMN)-lead titanate (PT) films are epitaxial and have a (001)-oriented perovskite structure. A scanning force microscope (SFM) was employed to probe the domain configuration and piezoelectric response of the films. A comparison of the topographic and domain images showed that the large grains possessed a polydomain configuration. The average value of the piezo-response signal implied that there was a net spontaneous polarization pointing towards the bottom electrode in the as-grown films, presumably due to the presence of an internal field. The piezo-response hysteresis loop obtained while the films were subjected to a dc bias voltage exhibited a behavior that was dependent on the PbTiO 3 content, indicating that the mechanism behind the field-induced strain depended on the composition and structure.
ISSN:1044-5803
1873-4189
DOI:10.1016/S1044-5803(02)00242-5