Critical behavior of dielectric permittivity and nonlinear dielectric effect in the isotropic phase of nematogens.

被引：0

作者：

Drozd-Rzoska, A ^{[1
]}

Rzoska, SJ ^{[1
]}

Ziolo, J ^{[1
]}

机构：

[1] Silesian Univ, Inst Phys, PL-40007 Katowice, Poland

来源：

LIQUID CRYSTALS: PHYSICS, TECHNOLOGY AND APPLICATIONS | 1998年 / 3318卷

关键词：

isotropic-nematic transition; critical phenomena; dielectric permittivity; nonlinear dielectric effect;

D O I：

10.1117/12.299973

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The paper shows that the behaviour of dielectric permittivity (epsilon) and its changes in a strong electric field (nonlinear dielectric effect - NDE) can be described in the way analogous to that applied in critical binary solutions. Basing on measurement in 4,4-n-hexylcyanobiphenyl (6CB) and 4,4-n-tetracyanobiphenyl (4CB) it was possible to portray the temperature behavior of epsilon and NDE from T-C up to T-C + 50 K. In the case of 4CB the satisfied description was possible despite the fact that the sample crystallises before reaching the clearing point. NDE tests was conducted for the measurement frequency f = 70 kHz, what allowed to avoid the influence of relaxation processes on results.

引用

页码：218 / 222

页数：5