Table of Contents
ISRN Condensed Matter Physics
Volume 2012 (2012), Article ID 969830, 5 pages
Research Article

Analysis of the Dielectric Constant as a Function of Temperature at Constant Electric Fields for the Smectic A-Smectic G Transition in A6

1Department of Physics, Middle East Technical University, 06531 Ankara, Turkey
2Department of Physics, Yuzuncu Yil University, 65080 Van, Turkey

Received 25 September 2012; Accepted 10 October 2012

Academic Editors: K. Kasamatsu, R. Rossmanith, V. Stephanovich, and S. Wang

Copyright © 2012 H. Yurtseven and E. Kilit. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The temperature dependence of the dielectric constant is studied under some fixed electric fields for the smectic G- (tilted-) smectic A (orthogonal) transition of the ferroelectric liquid crystal of compound A6. For this study, a mean field model with the quadrupole-quadrupole interactions is introduced. By fitting the inverse dielectric susceptibility from the mean field model to the experimental data from the literature, the observed behaviour of the dielectric constant is described satisfactorily for the smectic AG transition in A6. The transition temperature induced by an external electric field is also discussed for this ferroelectric compound.