Novel measurement method for flexoelectric coefficients of nematic liquid crystals

被引：51
|
作者：
Takahashi, T [1 ]
Hashidate, S [1 ]
Nishijou, H [1 ]
Usui, M [1 ]
Kimura, M [1 ]
Akahane, T [1 ]
机构：
[1] Nagaoka Univ Technol, Fac Engn, Dept Elect Engn, Niigata 94021, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1998年 / 37卷 / 4A期
关键词：
nematic liquid crystals; flexoelectric; flexoelectric coefficient; e(11)+e(33); e(11)-e(33); HAN cell;
D O I：
10.1143/JJAP.37.1865
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A new measurement method for the flexoelectric coefficient e(11) and e(33) (corresponding to the splay and bend strain, respectively) of nematic liquid crystals (LCs) is proposed. The values of e(11) + e(33) and e(11) - e(33) can be determined by fitting experimental electrooptical characteristics of hybrid aligned nematic (HAN) cells with numerical simulations. For the measurement of e(11) + e(33) and e(11) - e(33), a dc electric field is applied along the cell normal and along the cell surface, respectively. The measurements were carried out for two nematics, N-(4-methoxybenzylidene)-4'-n-butylaniline (MBBA) and ZLI-4792. As a result, e(11) + e(33) = (-5.4 = 1.0) x 10(-11) C/m and e(11) - e(33) = (1.4 = 0.1) x 10(-11) C/m for MBBA, \e(11) + e(33)\ less than or equal to 1.0 x 10(-11) C/m and e(11) - e(33) = (-1.5 +/- 0.1) x 10(-11) C/m for ZLI-4792 were obtained.
引用
收藏
页码：1865 / 1869
页数：5
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