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Phase Transition and Pyroelectric Properties of La-Modified PbTiO3 Thin Films

Published online by Cambridge University Press:  10 February 2011

Kenji Iijima  and
Koichi Niihara
Kenji Iijima
Affiliation:
Fine Ceramics Research Association, Synergy Ceramics Laboratory, Hirate-cho, Kita-ku, Nagoya 462, Japan, [email protected]
Koichi Niihara
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, Ibaraki, Osaka 567, Japan
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Abstract

Phase transition and related electric properties of La-modified PbTiO3 (PLT) thin films were investigated. Curie temperature of the films decreased and the diffuseness of the phase transition increased with increasing La content. Simultaneously, it was losing a ferroelectricity and pyroelectric properties degraded in La-rich region. This is considered to be due to the increase of a defect in the film by exchanging Pb2+ ions to La3+ ions. Compensation of the defect by the addition of Mn ion improve the ferroelectricity of the PLT and the films showed an extremely large pyroelectric properties.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 493: Symposium U – Ferroelectric Thin Film VI , 1997 , 453
Copyright
Copyright © Materials Research Society 1998

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References

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