High frequency relaxation in nematic liquid crystal mixtures by brillouin scattering

被引：2

作者：

Siny, IG ^{[1
]}

Tu, CS ^{[1
]}

Schmidt, VH ^{[1
]}

机构：

[1] MONTANA STATE UNIV,DEPT PHYS,BOZEMAN,MT 59717

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1995年 / 269卷

关键词：

liquid crystal; nematic; relaxation; Brillouin scattering;

D O I：

10.1080/10587259508037326

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Brillouin scattering as a function of scattering angles from 180 to similar to 10 degrees has been measured in the nematic phases of two liquid crystal mixtures, E. Merck ZLI-2861 and E7, without any preferred orientation. Such measurements at room temperature cover the frequency range from similar to 10 to similar to 1 GHz. The behavior of both the frequency shifts and linewidths is explained by a single time internal relaxation process with the characteristic frequencies 3.2 (ZLI-2861) and 1.2 (E7) GHz respectively. The behavior of the hypersonic attenuation shows no correlation with the static bulk viscosity in the nematic phase.

引用

页码：125 / 132

页数：8

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