Calculation of the Dielectric Constant of a Ferroelectric Liquid Crystal From a Mean Field Model
FERROELECTRICS, cilt.420, ss.56-61, 2011 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 420
- Basım Tarihi: 2011
- Doi Numarası: 10.1080/00150193.2011.594007
- Dergi Adı: FERROELECTRICS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.56-61
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
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).