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Thermodynamics of Epitaxial Ferroelectric Films.

Published online by Cambridge University Press:  15 February 2011

S. B. Desu ,
V. P. Dudkevich ,
P. V. Dudkevich ,
I. N. Zakharchenko  and
G. L. Kushlyan
S. B. Desu
Affiliation:
Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA 24061, desu@vtvml.cc.vt.edu
V. P. Dudkevich
Affiliation:
Institute of Physics, Rostov State University, Rostov-on-Don, 344090, Stachki 194, Russia
P. V. Dudkevich
Affiliation:
Institute of Physics, Rostov State University, Rostov-on-Don, 344090, Stachki 194, Russia
I. N. Zakharchenko
Affiliation:
Institute of Physics, Rostov State University, Rostov-on-Don, 344090, Stachki 194, Russia
G. L. Kushlyan
Affiliation:
Institute of Physics, Rostov State University, Rostov-on-Don, 344090, Stachki 194, Russia
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Abstract

The problem of phase transitions and physical properties of the BaTiO3-type films on the (001) single-crystal substrates of the cubic syngony was solved in the limits of the Landau- Devonshire thermodynamics. The thermoelastic film-substrate interaction caused by the difference between thermal expansion coefficients was strictly taken into consideration. The model was based on the following assumptions: 1) the film is closely conjugated with the substrate; 2) the film is sufficiently “thick”to find itself unstrained at the growth temperature Ts, ( growth stresses were compensated by misfit dislocations ), and 3) the film is sufficiently “thin, and the stresses arising at the temperatures T>Ts may be considered to be uniform.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 401: Symposium G – Epitaxial Oxide Thin Films II , 1995 , 195
Copyright
Copyright © Materials Research Society 1996

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References

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