Experimental evidence of an ambient ferroelectric phase and a low frequency-induced transition in an achiral mesogen

被引：23

作者：

Mohan, Mathukumallli Lakshmi Narayana Madhu ^{[1
]}

Arunachalam, Balasubramanian ^{[1
]}

机构：

[1] Bannari Amman Inst Technol, Liquid Crystal Res Lab, Sathyamangalam 638401, India

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES | 2008年 / 63卷 / 7-8期

关键词：

organic compound; ferroelectricity; optical properties;

D O I：

10.1515/zna-2008-7-808

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of achiral liquid crystals with an azo base have been Successfully isolated. Thermal and electrical characteristics of these compounds are studied. One of the mesogens exhibits liquid crystallinity at ambient temperature which is observed to be ferroelectric and can be switched. For the first time in the class of achiral liquid crystals, one of the compounds of the isolated series exhibits it low frequency-induced transition (LFiT) from ferroelectric to antiferroelectric ordering. Furthermore this transition can be controlled by proper attenuation of an applied frequency to the mesogen. The threshold frequency and its implication on the LET along with the thermal and electrical characterizations of the mesogens are discussed.

引用

页码：435 / 439

页数：5

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