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Microstructural development of BaTiO3 heteroepitaxial thin films by hydrothermal synthesis

Published online by Cambridge University Press:  31 January 2011

A. T. Chien ,
L. Zhao ,
M. Colic ,
J. S. Speck  and
F. F. Lange
A. T. Chien
Affiliation:
Materials Research Laboratory and Materials Department, University of California, Santa Barbara, California 93106
L. Zhao
Affiliation:
Materials Research Laboratory and Materials Department, University of California, Santa Barbara, California 93106
M. Colic
Affiliation:
Materials Research Laboratory and Materials Department, University of California, Santa Barbara, California 93106
J. S. Speck
Affiliation:
Materials Research Laboratory and Materials Department, University of California, Santa Barbara, California 93106
F. F. Lange
Affiliation:
Materials Research Laboratory and Materials Department, University of California, Santa Barbara, California 93106
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Abstract

The hydrothermal growth of epitaxial BaTiO3 thin films on single-crystal SrTiO3 substrates occurs by the island growth mode. The aqueous solution chemistry is found to control interfacial characteristics and plays an important role in controlling film formation and faceting. Island faceting can be changed by the introduction of additional cations during synthesis. Electrophoretic data, confirmed by adsorption measurements, show that barium is a potential determining counterion and adsorbs on SrTiO3 surfaces. Initial electrical measurements show that the BaTiO3 films have a dielectric constant of 141 with a loss tangent of 0.9 that decreases with heat treatment.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 3 , March 1998 , pp. 649 - 659
Copyright
Copyright © Materials Research Society 1998

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