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The influence of the Ti/Ba ratio on the formation of pyroelectric and piezoelectric quasi-amorphous films of BaTiO3

Published online by Cambridge University Press:  31 January 2011

David Ehre
Affiliation:
Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 76200, Rehovot 76100, Israel
Vera Lyahovitskaya
Affiliation:
Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 76200, Rehovot 76100, Israel
Igor Lubomirsky
Affiliation:
Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 76200, Rehovot 76100, Israel
Corresponding
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Abstract

The influence of the Ti/Ba ratio on the formation of pyroelectric and piezoelectric quasi-amorphous BaTiO3 films was investigated. Three types of films, Ti-rich, Ba-rich, and stoichiometric, were pulled through a temperature gradient or subjected to isothermal heating. The quasi-amorphous polar phase only formed in films pulled through the temperature gradient with Ti/Ba ratio within the broad range of 0.95–1.1. This implies that quasi-amorphous pyroelectric and piezoelectric thin films are significantly more tolerant of a deviation from stoichiometry than their crystalline counterparts.

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Copyright © Materials Research Society 2007

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References

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