Calculation of the Dielectric Constant of a Ferroelectric Liquid Crystal From a Mean Field Model

YURTSEVEN H. H., Yurtseven H.

FERROELECTRICS, vol.420, pp.56-61, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 420
  • Publication Date: 2011
  • Doi Number: 10.1080/00150193.2011.594007
  • Journal Name: FERROELECTRICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.56-61
  • Middle East Technical University Affiliated: Yes

Abstract

The static dielectric constant epsilon(perpendicular to) of the ferroelectric liquid crystal 4-(3-methyl-2-chlorobutanoyloxy)-4'--heptyloxybiphenyl (A7) with high spontaneous polarization is calculated as a function of temperature using a mean field model. This calculation is performed close to the smectic A-isotropic liquid (SmA-I) transition for pure optically active compound (T-c = 81.6 degrees C). For this calculation of epsilon(perpendicular to), the free energy of the SmA phase is expanded in terms of the orientational order parameter. and spontaneous polarization P with P-2 psi(2).