RELAXATION MODES AND VISCOELASTIC PROPERTIES IN AN ANTIFERROELECTRIC LIQUID-CRYSTAL (R)-MHPOBC OBSERVED BY PHOTON-CORRELATION SPECTROSCOPY

被引：19

作者：

SUN, HY

ORIHARA, H

ISHIBASHI, Y

机构：

[1] Synthetic Crystal Research Laboratory, School of Engineering, Nagoya University, Furo-cho, Chikusa-ku

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1993年 / 62卷 / 06期

关键词：

ANTIFERROELECTRIC LIQUID CRYSTAL; MHPOBC; GOLDSTONE MODE; PHASE MODE; PHOTON CORRELATION;

D O I：

10.1143/JPSJ.62.2066

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Photon-correlation spectroscopy was performed to observe relaxation modes in an antiferroelectric liquid crystal (R)-MHPOBC. A phase mode in the SmI(A)* phase, which is the same as one in the incommensurate phase of solid, was observed for the first time. From the dispersion relations of the Goldstone modes in the SmC(gamma)* and SmC(A)* phases, the ratios of orientational elastic constants to the viscosity coefficient were obtained as a function of temperature. A linear temperature dependence of the inverse pitch in the SmC(A)* phase was also found, which was discussed on the basis of the phenomenological theory.

引用

页码：2066 / 2073

页数：8

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