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|Type:||Artigo de periódico|
|Title:||Temperature Dependence Of The Refractive Index Near The Reentrant-isotropic--calamitic-nematic Phase Transition.|
|Author:||Pereira, J R|
Mansanares, A M
Palangana, A J
Baesso, M L
|Abstract:||The laser-induced nonlinear optical response of a lyotropic liquid crystal system in the reentrant-isotropic and calamitic-nematic phases is investigated by the use of the thermal lens technique. The occurrence of an inversion in the temperature coefficient of the ordinary refractive index, dn(radially)/dT, near the reentrant-isotropic-calamitic-nematic phase transition, is discussed. This effect is attributed to the behavior of the electronic polarizability due to the change in micelle shape near the isotropic-nematic transition, and correlated with the results obtained near the nematic-isotropic transition, previously reported.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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