Field driven helix unwinding in thick AFLC cells

被引：15
作者：
Judge, LA [1 ]
Kriezis, EE [1 ]
Elston, SJ [1 ]
机构：
[1] Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England
来源：
MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2001年 / 366卷
基金：
英国工程与自然科学研究理事会;
关键词：
antiferroelectric; helix; unwinding; switching; distortion;
D O I：
10.1080/10587250108024007
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The interaction of the antiferroelectric helix with an electric field applied perpendicular to its axis is investigated, A two stage switching process is observed, in which the helix unwinds to an intermediate state in the pretransitional regime, at voltages below the threshold for antiferroelectric to ferroelectric switching. A series of experimental studies and theoretical modelling show that the intermediate state is an antiferroelectric state in which the directors lie in the plane containing the applied electric field and the smectic laver normal. The mechanism for the unwinding process is the interaction of the applied field with an induced polarisation, which arises from a distortion to the antiferroelectric ordering.
引用
收藏
页码：661 / 671
页数：11
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