Anomalous behaviour in the SmA*-SmCA* pre-transitional regime of a chiral swallow-tailed antiferroelectric liquid crystal

被引：9
作者：
Bhattacharyya, Surjya Sarathi [1 ]
Rahman, M. [1 ]
Mukherjee, A. [1 ]
Chaudhuri, B. K. [1 ]
Wu, S. L. [2 ]
机构：
[1] Indian Assoc Cultivat Sci, Dept Solid State Phys, Kolkata 700032, India
[2] Tatung Inst Technol, Dept Chem Engn, Taipei 104, Taiwan
来源：
LIQUID CRYSTALS | 2008年 / 35卷 / 06期
关键词：
chiral swallow-tailed antiferroelectric liquid crystal; pre-transitional regime; dielectric anomaly; electroclinic effect;
D O I：
10.1080/02678290802130231
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The temperature- and electric field-dependent dielectric relaxation and polarisation of a new chiral swallow tailed antiferroelectric liquid crystal, i.e. 1-ethylpropyl (S)-2-{6-[4-(4'-decyloxyphenyl)benzoyloxy]-2-naphthyl}propionate (abbreviated as EP10PBNP), were investigated. The electric field-induced dielectric loss spectra of EP10PBNP revealed electroclinic and anomalous dielectric behaviour in the chiral smectic A (SmA*)-chiral antiferroelectric smectic C (SmCA*) pre-transitional regime. From an analysis of thermal hysteresis of the dielectric constant, electric field-induced polarisation and dielectric loss spectra, the appearance of a ferrielectric-like mesophase is observed followed by an unstable SmCA* phase in the SmA*-SmCA* pre-transitional regime.
引用
收藏
页码：751 / 756
页数：6
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