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Refractive indices and order parameters of two liquid crystals

Horn, R. G. 1978, Refractive indices and order parameters of two liquid crystals, Journal de Physique, vol. 39, no. 1, pp. 105-109, doi: 10.1051/jphys:01978003901010500.

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Title Refractive indices and order parameters of two liquid crystals
Author(s) Horn, R. G.
Journal name Journal de Physique
Volume number 39
Issue number 1
Start page 105
End page 109
Total pages 5
Publisher Springer
Place of publication Amsterdam, The Netherlands
Publication date 1978-01
ISSN 1434-6028
Keyword(s) nematic liquid crystals
organic compounds
refractive index
smectic liquid crystals
Summary Refractive indices have been measured throughout the nematic phase of 4-n-pentyl-4'cyanobiphenyl (5CB) and the smectic A and nematic phases of 4-n-octyl-4'-cyanobiphenyl (8CB). The Vuks and Neugebauer methods of calculating the order parameter are compared. Without knowledge of the molecular polarisabilities it is only possible to calculate a quantity proportional to the order parameter, and within this limitation it is found that the two methods give identical results. The order parameter is scaled using the extrapolation method suggested by Haller [14]. Using a suitable average of the refractive indices and the density data of Gannon and Faber [9], it is shown that the Lorentz-Lorenz relation is obeyed over a 2 % density range in 5CB.
Language eng
DOI 10.1051/jphys:01978003901010500
Field of Research 029999 Physical Sciences not elsewhere classified
Socio Economic Objective 970102 Expanding Knowledge in the Physical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©1978, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30041449

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