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Liquid Crystals and their Application
Russian Journal Zhidkie kristally i ikh prakticheskoe ispol'zovanie Жидкие кристаллы и их практическое использование |
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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2015, 15 (2), 35—43. |
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Dielectric Permittivity Anisotropy of the LC-1282 Mixture
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D. N. Chausov, A. D. Kurilov, M. S. Konstantinov, V. V. Belyaev, D. L. Bogdanov
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Author affiliations
Educational and Research Laboratory of Theoretical and Applied Nanotechnology,
Moscow Region State University,
10a Radio St., Moscow, 105005, Russia
E-mail: d.chausov@yandex.ru
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Abstract
The temperature dependences of the real ε' and imaginary ε'' components of the complex dielectric permittivity and their anisotropies Δε for the liquid crystal mixture LC-1282 in the frequency range 10–1000 kHz and in the wide temperature region are experimentally obtained. Relaxation time value, a value of the activation energy and the molecular friction coefficient are calculated based on the evidence found. Dependences of the dielectric constant on the orientation angle of the magnetic field relatively the electric field are analyzed. It is shown that at low temperature and the external field frequency the effect of the esters in the LC mixture plays a key role in the relaxation process.
Keywords: liquid crystals, dielectric spectroscopy, anisotropy, activation energy
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