Field-induced transformations in the biaxial order of non-tilted phases in a bent-core smectic liquid crystal
Department of Electronic and Electrical Engineering, School of Engineering, Trinity College, University of Dublin Dublin 2, Ireland, EU
2 School of Electronic & Communication Engineering, Dublin Institute of Technology - Dublin, Ireland, EU
3 Institute of Chemistry, Organic Chemistry, Martin-Luther-University Halle-Wittenberg - D-06120 Halle, Germany, EU
Accepted: 27 September 2010
The structural and electro-optic investigations of an achiral bent-core molecule in SmAPA phase, in which the polar directors in the neighboring layers are arranged anti-ferroelectrically, show that it undergoes transformation from one biaxial to another biaxial structure via a quasi-stable uniaxial structure on the application of the electric field. The non-continuous change in biaxiality is explained by an intermediate state in which the secondary directors in the neighboring layers are perpendicular to each other.
PACS: 61.30.Gd – Orientational order of liquid crystals; electric and magnetic field effects on order / 77.80.-e – Ferroelectricity and antiferroelectricity / 78.20.Fm – Birefringence
© EPLA, 2010