Polarization and dielectric properties of an antiferroelectric liquid crystal

被引：19

作者：

OSullivan, JW

Vij, JK

Nguyen, HT

机构：

[1] UNIV DUBLIN TRINITY COLL,DEPT ELECT ENGN & ELECT,DUBLIN 2,IRELAND

[2] CTR RECH PAUL PASCAL,F-33600 PESSAC,FRANCE

来源：

LIQUID CRYSTALS | 1997年 / 23卷 / 01期

关键词：

D O I：

10.1080/026782997208695

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The spontaneous polarization and dielectric properties of a new antiferroelectric liquid crystal (AFLC) exhibiting several intermediate phases between the SmCA and SmC* phases are investigated. A low frequency ferri Goldstone mode and a higher frequency ferro Goldstone mode have been observed over a certain range of temperatures. The effect of d.c. bias voltage on these modes is examined. The results confirm the existence of an FiLC phase with q(T) > 1/2 between SmCgamma and SmC*. These also show the co-existence of the FiLC phase with SmC* over a narrow range of temperatures above the FiLC phase. The phase sequence for this material is found to contain SmCA, SmCgamma, FiLC, (FiLC coexisting with SmC*), SmC*, SmA phases on heating and SmA- SmC* SmCgamma- SmCA- phases on cooling.

引用

页码：77 / 86

页数：10

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