J. Phys. II France
Volume 6, Numéro 5, May 1996
Page(s) 753 - 765
DOI: 10.1051/jp2:1996209
J. Phys. II France 6 (1996) 753-765

Nonlinear Switching in Surface Stabilized Ferroelectric Liquid Crystals

E.I. Demikhov1, S.A. Pikin2 and E.S. Pikina3

1  Institute of Physical Chemistry, University of Paderborn, 33095 Paderborn, Germany
2  Institute of Crystallography, Russian Academy of Sciences, 117333 Moscow, Russia
3  Institute of Oil and Gas Problems, Leninsky pr. 63, 117917 Moscow, Russia

(Received 4 May 1995, revised 22 September 1995, accepted 1 February 1996)

Dynamics of director field switching in the vicinity of the SmA-SmC * phase transition is studied by means of light scattering. The resonance dependence of scattered intensity on the electric field frequency is observed. The resonance scattering disappears at lower temperatures. The observed anomaly is consistently explained in the framework of the nonlinear kink switching model. The results of this work demonstrate that in the case of materials with high spontaneous polarization this mechanism is predominant.

© Les Editions de Physique 1996