Flexoelectric effects in ferroelectric liquid crystals ?
نویسندگان
چکیده
منابع مشابه
Ferroelectric liquid crystals
2014 A general symmetry argument is presented, and experiments on newly synthesized p-decyloxybenzylidene p’-amino 2-methyl butyl cinnamate are described, demonstrating that chiral smectic C and H liquid crystals are ferroelectric. Some of the properties of this new class of ferroelectrics are discussed. In spite of speculation on the possibility of ferroelectric liquid crystalline phases [1], ...
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The flexoelectric polarization (Pf) of four bent-core nematic liquid crystals (LCs) has been measured using the pyroelectric effect. Hybrid aligned nematic cells are fabricated for measuring the pyroelectric response over the entire range of the nematic phase. It is found that the magnitude of flexoelectric polarization Pf and the sum of the flexoelectric coefficients |e1+e3| for the bent-core ...
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We report on the converse flexoelectric effect in two bent-core nematic liquid crystals with opposite dielectric anisotropies. The results are based on electro-optic investigations of inplane field-driven distortions in homeotropic samples (the Helfrich method). They are interpreted by an extension of the Helfrich theory that takes into account the higher order distortions. The bend flexocoeffi...
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As we have discussed in Chapter I of this thesis, the nematic director is apolar. IIence the usual dielectric coupling with an external electric field depends quadratically on the latter. However, as has been discussed earlier a deformed director field with a splay and/or bend distortion can lead to a flexoelectric polarisation of the medium. The response of liquid crystals to an electric field...
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ژورنال
عنوان ژورنال: Journal de Physique Lettres
سال: 1980
ISSN: 0302-072X
DOI: 10.1051/jphyslet:0198000410204300