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Nanoscale investigation of polar structure of (1-x)PbMg1/3Nb2/3O3-xPbTiO3 single crystals

Published online by Cambridge University Press:  01 February 2011

V. V. Shvartsman ,
M. Wojtas ,
S. Vakhrushev  and
A. L. Kholkin
V. V. Shvartsman
Affiliation:
Department of Ceramics and Glass Engineering/CICECO, University of Aveiro, 3810–193 Aveiro, Portugal
M. Wojtas
Affiliation:
Faculty of Chemistry University of Wroclaw, Joliot-Curie 14, 50–383 Wroclaw, Poland
S. Vakhrushev
Affiliation:
A. F. Ioffe Physico-Technical Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia
A. L. Kholkin
Affiliation:
Department of Ceramics and Glass Engineering/CICECO, University of Aveiro, 3810–193 Aveiro, Portugal
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Abstract

ABSTRACT (1-x)PbMg1/3Nb2/3O3-xPbTiO3 (PMN-PT) single crystals of different compositions were studied via piezoresponse force microscopy (PFM). Piezoelectric contrast has been observed in 0.9PMN-0.1PT above the temperature of structural transition indicating spatial distribution of polarization and was attributed to the existence of polar clusters. The domain patterns were found to change drastically with increasing Ti content. In particular, the piezoresponse images of 0.8PMN-0.2PT combine both relaxor and ferroelectric features and in 0.65PMN-0.35PT crystals only micron-sized ferroelectric domains were observed. The evolution of the polar structures with increasing temperature and under external electric field was also investigated. The nature of the observed phenomena is discussed based on the current understanding of the relaxor state in ferroelectrics and possible influence of PFM instrumentation

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 785: Symposium D – Materials and Devices for Smart Systems , 2003 , D4.11
Copyright
Copyright © Materials Research Society 2004

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References

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