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Phase Diagrams for Incommensurate Systems

Published online by Cambridge University Press:  21 February 2011

P. Toledano
P. Toledano*
Affiliation:
Groupe de Physique théorique, Faculté des Sciences d'Amiens 33, rue Saint-Leu, 80039 Amiens Cedex, France
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Abstract

Phase diagrams, for systems undergoing one or several incommensurate and lock-in transitions, are discussed in the framework of the Landau theory of phase transitions. It is shown that their essential features can be deduced from the explicit forms of the free-energy density ø and the k-dispersion of the coefficient α(→k)of the quadratic contribution of the order-parameter components in ø. Two families of phase diagrams are distinguished depending on symmetry considerations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 21: Symposium GREECE – Phase Transformations in Solids , 1983 , 75
Copyright
Copyright © Materials Research Society 1984

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References

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