A First-Order Transition of the Smectic A-Smectic C* in Ferroelectric Liquid Crystals

Kilit E., Yurtseven H.

FERROELECTRICS, cilt.427, ss.137-142, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 427
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1080/00150193.2012.675830
  • Dergi Adı: FERROELECTRICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.137-142
  • Anahtar Kelimeler: Dielectric constant, AC* transition, A7, HIGH SPONTANEOUS POLARIZATION, PHASE-TRANSITION, DEPENDENCE, MODEL
  • Van Yüzüncü Yıl Üniversitesi Adresli: Evet

Özet

The static dielectric constant is calculated as a function of temperature using a mean field model close to the smectic A-smectic C* transition for the ferroelectric liquid crystal 4-(3-methyl-2-chlorobutanoyloxy)-4'-heptyloxybiphenyl (A7). This calculation of the dielectric constant is performed for the pure optically active compound (T-c = 73.4 degrees C) and the temperature range is determined for a first-order smectic A-smectic C* transition from the mean field model. Our predicted values describe adequately the observed behaviour of the dielectric constant close to the smectic A-smectic C* transition and also the temperature range in the smectic A phase of A7.