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Local piezoelectric and ferroelectric responses in nanotube-patterned thin films of BaTiO3 synthesized hydrothermally at 200 °C

Published online by Cambridge University Press:  01 March 2006

Rosalía Poyato
Affiliation:
Department of Materials Science and Engineering, Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269
Bryan D. Huey
Affiliation:
Department of Materials Science and Engineering, Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269
Nitin P. Padture*
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210
*
b) Address all correspondence to this author.e-mail: padture.1@osu.edu
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Abstract

Piezoresponse atomic-force microscopy (PFM) has been used to characterize the local piezoelectric properties of a novel, nanotube-patterned (“honeycomb”) thin film of BaTiO3 on Ti substrate synthesized hydrothermally at 200 °C. PFM amplitude and phase images, prior to the application of any direct current (dc) field, show ring-shaped piezoelectric regions that correspond to the nanostructure of this film. These results show clearly that the as-synthesized nanotube-patterned BaTiO3 thin film is piezoelectric, with a net spontaneous polarization perpendicular to the film–substrate interface. In addition, polarization switching and hysteresis were observed as a function of applied dc field, confirming that this novel fabrication procedure results in unique configurations of BaTiO3 film that are also ferroelectric.

Type
Rapid Communications
Copyright
Copyright © Materials Research Society 2006

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