Elastic constants of an achiral smectic-C material.

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Abstract

A Freedericksz transition technique was used to measure the elastic consts. of a smectic-C material with pos. dielec. anisotropy. The layer geometry was detd. via x-ray scattering and the Freedericksz transition was monitored both optically and from the field-dependent intensity of the Bragg peaks. The splay elastic const., k11, was measured across the nematic phase range and correlated with the B2 c-director distortion in the smectic-C phase. An est. of the sum of the layer bending elastic consts. was also made and A21 + A11 is neg. and takes a value around 10-4N. [on SciFinder (R)]

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Elasticity (elastic consts. of achiral smectic-C binary liq. crystal mixt.) Dielectric anisotropy (pos. of achiral smectic-C binary liq. crystal mixt.) Liquid crystals (smectic C elastic consts. of achiral smectic-C binary liq. crystal mixt.)

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