Reference : The dependence on the helical pitch of the antiferroelectric dielectric modes
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
The dependence on the helical pitch of the antiferroelectric dielectric modes
Lagerwall, Jan mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Fütterer, T. [> >]
Moro, D. [> >]
Heppke, Gerd [> >]
Haase, W. [> >]
Weyrauch, T. [> >]
Taylor & Francis Ltd
Yes (verified by ORBilu)
[en] In an attempt to determine the physical nature of the low-frequency dielectric mode in antiferroelectric liquid crystals, we have studied the dielectric response in thick planar-oriented samples of Smectic C/sub A/* compounds undergoing a helix inversion. If the mode is collective there ought to be a minimum in the dielectric absorption due to the mode, at the temperature at which the helical pitch diverges. Although the effect is not large, we find minima for both antiferroelectric modes at this point, indicating that both modes are related to the helical director structure. A corresponding experiment has also been performed on a binary mixture which shows a helix inversion for a certain mixing ratio. However, because the effect in this case is overshadowed by unavoidable variations in other parameters, no minimum was detected.

File(s) associated to this reference

Fulltext file(s):

Open access
Lagerwall et al 1999Author postprint160.45 kBView/Open

Bookmark and Share SFX Query

All documents in ORBilu are protected by a user license.