Anchoring energy and orientational elasticity of a ferroelectric liquid crystalстатья
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Дата последнего поиска статьи во внешних источниках: 19 декабря 2016 г.
Аннотация:The dielectric susceptibility of a helix-free ferroelectric liquid crystal layer has been experimentally and theoretically studied as a function of the layer thickness. The investigation has been performed on the inner branch of the polarization hysteresis loop, in the region of a linear dependence of the polarization on the electric field. The experimental results are explained using the notion of effective layer thickness, which involves the characteristic distance xi over which the orienting effect of interfaces is operative. Comparison of the experimental data and theoretical results made it possible to estimate this distance as xi = 41 mu m and evaluate the anchoring energy (W = 2.8 x 10(-3)-1.1 x 10(-2) J/m(2)) and the intralayer elastic constant (KaEuro(3) a parts per thousand 1 x 10(-8)-3 x 10(-7) N).