Induced Antiferroelectric Smectic-C*A Phase by Doping Ferroelectric-C* Phase with Bent-Shaped Molecules.

TitleInduced Antiferroelectric Smectic-C*A Phase by Doping Ferroelectric-C* Phase with Bent-Shaped Molecules.
Publication TypeJournal Article
Year of Publication2000
AuthorsGorecka, E, Nakata, M, Mieczkowski, J, Takanishi, Y, Ishikawa, K, Watanabe, J, Takezoe, H, Eichhorn, SH, Swager, TM
JournalPhysical Review Letters
Volume85
Pagination2526–2529
ISSN0031-9007
Keywordsdoping ferroelec smectic liq crystal induced antiferroelec phase
Abstract

Doping of the ferroelec. Sm-C* phase with bent-shaped mols. induces the antiferroelec. Sm-C*A phase. The effect was obsd. by electrooptic and dielec. measurements in systems with weak interlayer interactions in which the relative strength of anticlinic-synclinic order between mols. in adjacent layers is easily controlled by external factors. FTIR spectroscopy studies suggest that the bent-shaped mols. are not flat. They reorient upon the elec. field-induced antiferroelec.-ferroelec. transition to adopt a position in which the av. direction of the carbonyl groups is in the smectic plane and a bending tip along the C2 symmetry axis. [on SciFinder(R)]

DOI10.1103/PhysRevLett.85.2526