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Temperature dependence of the rotatory power in the SmC* phase of DOBAMBC

Authors
  • Seppen, A.
  • Muševič, I.
  • Maret, G.
  • Žekš, B.
  • Wyder, P.
  • Blinc, R.
Publication Date
Jan 01, 1988
Source
HAL
Keywords
Language
English
License
Unknown
External links

Abstract

High resolution measurements of the temperature dependence of the optical rotatory power ρ (T) in the SmC* phase of the ferroelectric liquid crystal DOBAMBC are presented. Special emphasis is on the region near the SmC*-SmA transition. These data together with measurements of the pitch allow for a determination of the molecular tilt angle in the helicoidal structure. This is believed to be the first optical measurement of the tilt in an unperturbed SmC* phase, i.e. without unwinding of the helix. The measurements of the tilt angle in this case are compared with those on the unwound structure and are briefly discussed in connection with theory.

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