| Autor: |
Marinov, Y., Petrov, A. G., Hinov, H. P. |
| Předmět: |
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| Zdroj: |
Molecular Crystals & Liquid Crystals; 2006, Vol. 449 Issue 1, p33-45, 13p, 2 Graphs |
| Abstrakt: |
The threshold characteristics U c ( U ac ), q c ( U ac )and q c ( U c ), where U c is the d.c. threshold voltage, U ac is a high-frequency orienting voltage with a frequency above 5000 Hz, and q c is the threshold wave number of the flexoelectric domains of Vistin'-Pikin-Bobylev, excited under the joint action of a d.c. voltage and a high-frequency orienting voltage, have been theoretically calculated for the case of anisotropic elasticity. These domains have been experimentally obtained in the nematic liquid crystal p-n-butyl-p-methoxyazoxy-benzene (BMAOB). The fitting of the experimental points by the theoretical curves permitted to obtain precisely the elastic constants of splay K 11 and twist , and the modulus of the difference between the flexoelectric coefficients of splay e 1z and bend , for a ?e, varying between - 0.20 and - 0.25. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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