Effect of molecular rotational hindrance on the spontaneous polarization in the S*C phase of a ferroelectric liquid crystal

A. Buka, K. Siemensmeyer, H. Stegemeyer

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The spontaneous polarization, P s, and the tilt angle, θ, have been measured simultaneously in the S*C phase of binary mixtures of two ferroelectric liquid crystals as a function of temperature and concentration. A molecular rotational model was used in order to calculate the temperature dependence of the P s/θ ratio. A two parameter fit of the experimental data was carried out which showed good agreement. The molecular rotational potentials have been determined from the fit parameters and are presented as a function of concentration. It is shown that the chiral part of the potential depends very weakly on the composition in contrast to the non-chiral part which shows a strong negative non-linear deviation with a minimum corresponding to the concentration at which the smectic C* phase width is maximal.

Original languageEnglish
Pages (from-to)701-708
Number of pages8
JournalLiquid Crystals
Volume6
Issue number6
DOIs
Publication statusPublished - 1989

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Liquid Crystals
Liquid crystals
Ferroelectric materials
liquid crystals
Polarization
polarization
Binary mixtures
Temperature
binary mixtures
Chemical analysis
deviation
temperature dependence
temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Effect of molecular rotational hindrance on the spontaneous polarization in the S*C phase of a ferroelectric liquid crystal. / Buka, A.; Siemensmeyer, K.; Stegemeyer, H.

In: Liquid Crystals, Vol. 6, No. 6, 1989, p. 701-708.

Research output: Contribution to journalArticle

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