INFLUENCE OF ELECTRIC-FIELD ON A 1ST-ORDER SMECTIC-A FERROELECTRIC-SMECTIC-C LIQUID-CRYSTAL PHASE-TRANSITION - A FIELD-INDUCED CRITICAL-POINT

被引：91

作者：

BAHR, C

HEPPKE, G

机构：

[1] Iwan-N.-Stranski-Institute for Physical and Theoretical Chemistry, Technical University of Berlin

来源：

PHYSICAL REVIEW A | 1990年 / 41卷 / 08期

关键词：

D O I：

10.1103/PhysRevA.41.4335

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The observation of a new critical point in liquid-crystal phase transitions is reported. Detailed tilt-angle, polarization, and susceptibility measurements of a ferroelectric liquid-crystal compound in the presence of an applied dc electric field show that a first-order phase transition between the polarized smectic-A phase and the ferroelectric-smectic-C phase terminates at a critical point in the temperature field plane. A liquid-crystal sample exhibiting a second-order smectic-Aferroelectric-smectic-C transition is studied by similar measurements demonstrating a clearly different behavior to the first-order compound. A simple Landau description of the new critical point is given. © 1990 The American Physical Society.

引用

页码：4335 / 4342

页数：8

共 43 条

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