Light scattering from the free surface near a second order nematic to smectic a phase transition
Open Access
- 1 January 1976
- journal article
- Published by EDP Sciences in Journal de Physique
- Vol. 37 (7-8) , 901-907
- https://doi.org/10.1051/jphys:01976003707-8090100
Abstract
We have studied the spectrum of light scattered by surfaces waves thermally excited on the free surface of a nematic liquid crystal in a magnetic field near a second order nematic to smectic A phase transition. We have measured the surface tension and three viscosity coefficients. One of the viscosities diverges and its critical behaviour has been followed to within 3 mK of the transition. The measured critical exponent is consistent with mean field theory for the two studied liquid crystals : cyanobenzilidene octyloxyaniline (CBOOA) and octyloxycyanobiphenyl (M 24)Keywords
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