Dielectric properties of two polar nematic liquid crystals

We report in this paper the dielectric properties of two polar nematic liquid crystals p-methoxybenzylidene-p'cyanoaniline (MBCA) and p-cyanobenzylidene-p'methoxyaniline (CBMA). The effect induced by dc and ac electric fields as well as magnetic field resulting to a deformation of the nema...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1991-04, Vol.30 (4), p.711-715
Main Authors: BELARBI-MASSOURAS, Z, GUILLAUD, G, TOURNILHAC, F, ACOURAG, H, KHELIFA, B
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectric properties of solids and liquids
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Permittivity (dielectric function)
Physics
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Summary:We report in this paper the dielectric properties of two polar nematic liquid crystals p-methoxybenzylidene-p'cyanoaniline (MBCA) and p-cyanobenzylidene-p'methoxyaniline (CBMA). The effect induced by dc and ac electric fields as well as magnetic field resulting to a deformation of the nematic director was studied at 10 kHz and 1 kHz. The dielectric anisotropies, splay elastic constants and diamagnetic anisotropies as well as the correlation factors are investigated by capacitance measurements. These results are discussed in terms of molecular properties and molecular degree association.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.30.711