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Landau model for polymer-stabilized ferroelectric liquid crystals: experiment and theory

Archer, P. and Dierking, I. and Osipov, M.A. (2008) Landau model for polymer-stabilized ferroelectric liquid crystals: experiment and theory. Physical Review E, 78 (5). 051703-051703. ISSN 1539-3755

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Abstract

The interaction between a phase separated polymer network and a liquid crystal was studied across the smectic-A* (Sm-A*) to smectic-C* (Sm-C*) phase transition of a polymer-stabilized ferroelectric liquid crystal polymerized in the Sm-A* phase. Using precise measurements of the tilt angle and the spontaneous polarization as functions of the external electric field and polymer concentration, the effective coefficients of the Landau expansion of the free energy of the Sm-C* phase have been determined experimentally. The observed polymer concentration dependence of the Landau expansion coefficients is explained using a more general theoretical model which incorporates the effect of polymer networks on the local liquid crystal director configuration. In particular, using experimental estimates of the penetration depth of the polymer network into the liquid crystal, it is shown that the b coefficient calculated from the Landau model increases with polymer concentration, evidencing the relationship determined experimentally.

Item type: Article
ID code: 19411
Keywords: landau model, polymer-stabilized ferroelectric liquid crystals, Polymer-stabilized liquid crystals, Mathematics, Physics
Subjects: Science > Mathematics
Science > Physics
Department: Faculty of Science > Mathematics and Statistics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 19 May 2010 12:51
    Last modified: 12 Mar 2012 11:12
    URI: http://strathprints.strath.ac.uk/id/eprint/19411

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