Journal ArticleDOI
Phenomenology of short-range-order effects in the isotropic phase of nematic materials
TLDR
In this article, the magnetic birefringence, the intensity and the width in frequency of the Rayleigh scattering, and the flow bireringence are discussed in terms of a small number of phenomenological parameters.About:
This article is published in Physics Letters A.The article was published on 1969-12-15. It has received 301 citations till now. The article focuses on the topics: Flow birefringence & Birefringence.read more
Citations
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Journal ArticleDOI
Short range order in the isotropic phase of nematic liquid crystals
TL;DR: In this paper, a theory of magnetic birefringence in the isotropic phase of nematic liquid crystals was developed taking into account orientational correlations between neighboring molecules.
Journal ArticleDOI
Picosecond investigation of optical field induced birefringence of the isotropic phase of a nematogen
TL;DR: In this paper, the authors used photosecond laser technics for the study of orientational relaxation time of nematogen molecules near isotropic-mesomorphic transition and gave direct informations about phase transition and temperature dependence of viscosity coefficient.
Journal ArticleDOI
Non-newtonian viscosity and normal pressure associated with the flow alignment in macromolecular liquids
TL;DR: In this paper, non-linear constitutive laws were applied to the calculation of flow alignment and the friction pressure tensor of macromolecular liquids, and a non-newtonian viscosity was obtained which decreases with increasing magnitude of the velocity gradient.
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Flexoelectric polarization and second order elasticity for nematic liquid crystals
TL;DR: In this article, the flexoelectric properties of nematic liquid crystals are analyzed in the limit of small scalar order parameter, i.e. near the clearing point, and it is shown that these coefficients have the same linear term in the scalar-order parameter, and differ for terms quadratic in this parameter.
Journal ArticleDOI
Isotropic-Nematic Transition: Landau-de Gennes vs Molecular Theory
Legess Senbetu,Chia-Wei Woo +1 more
TL;DR: In this paper, the authors compared the Landau-de-Gennes and molecular mean field descriptions of the isotropic-nematic transition and showed that corrections due to cubic and quartic terms in the LDE are non-negligible.
References
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Nuclear relaxation in a nematic liquid crystal
TL;DR: In this paper, the authors estimate the contributions to T1 and T2 in a nematic liquid crystal arising from the fluctuations in the orientational order, which results in relaxation times of the order of one second which is typical of ordinary liquids.
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Spin Relaxation and Self-Diffusion in Liquid Crystals
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Quasielastic Rayleigh Scattering in Nematic Liquid Crystals
TL;DR: Using a light-beat laser spectrometer, the authors observed the relaxation of the thermally excited fluctuations of anisotropy in the nematic phase of $p\ensuremath{-}\mathrm{azoxyanisole}$.