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Anisotropy of the local field of the light wave in cholesteric liquid crystals

Content Provider	Springer Nature Link
Author	Aver’yav, E. M.
Copyright Year	2010
Abstract	The experimental values of the L $_{j}$ components of the Lorentz tensor have been obtained for the first time for the quasinematic layer of the cholesteric phase and in the smectic phase A for homologs of cholesteric fatty ethers using the dispersion dependences of the refraction indices for the planar texture of cholesteric liquid crystals (CLCs). The dependence of the L $_{j}$ components on the homolog number, mesophase temperature, the magnitude of birefringence, and the change in the orientational ordering of molecules in the cholesteric phase and at the cholesteric-smectic A phase transition was determined. Isotropization of the Lorentz tensor L and the local field tensor f was found for CLCs when the birefringence of LCs and the anisotropy of molecular polarizability decreased simultaneously. The anisotropy Δf was found to be negative for the quasinematic layer of CLCs and the smectic phase in the visible range of the spectrum. The values of L $_{j}$, obtained with known local field models for CLCs and smectics A, gave positive Δf irrespective of the chemical structure of molecules, optical anisotropy of LCs, and the spectral region, which contradicts to the experiment.
Starting Page	883
Ending Page	888
Page Count	6
File Format	PDF
ISSN	00360244
Journal	Russian Journal of Physical Chemistry
Volume Number	84
Issue Number	5
e-ISSN	1531863X
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2010-05-07
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry

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