Molecular dynamics in liquid crystals by dielectric relaxation and neutron scattering

L. Bata, G. Pépy, L. Rosta

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Detailed dielectric permittivity and relaxation investigations have been performed on compounds having different liquid-crystalline phases. At the smectic B–smectic A as well as the smectic G–smectic B transitions definite jumps were found in the dielectric relaxation times associated with rotation of the molecules around their short axis. For the interpretation of the large jumps in the relaxation times the change of the phonon spectra at the two dimensional crystal-two dimensional liquid phase transition was assumed. To verify this idea an inelastic neutron scattering study was performed. The measurements have proved the good orientation of the smectic A and smectic B phases. The values of the layer spacing, and the appearance of libron peaks for the smectic B phase at different momentum transfer were determined.

Original languageEnglish
Pages (from-to)893-900
Number of pages8
JournalLiquid Crystals
Volume3
Issue number6-7
DOIs
Publication statusPublished - Jan 1 1988

ASJC Scopus subject areas

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

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