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IJPAP Vol.44(07) [July 2006] >


Title: Temperature dependent optical property studies of nematic mixtures
Authors: Soorya, T N
Gupta, Surabhi
Kumar, Anant
Jain, Sachin
Arora, V P
Keywords: Birefringence
Order parameter
Polarizability
Liquid crystals
Nematic mixtures
Issue Date: Jul-2006
Publisher: CSIR
IPC CodeG02F1/13
Abstract: The refractive indices ne and no, of two nematic mixtures: ZLI 2141-000 and ZLI 2452 have been measured in the temperature range 291-391 K using 589 nm light source. A slight modification to the four-parameter model given in Li J et al., J Appl Phys, 96 (2004) 19, is made to carry out the analysis of the data. The temperature dependence of refractive indices and the birefringence agree closely with that obtained using four-parameter model. Different parameters have been compared. The value of parameter β is larger for ZLI 2452 than for ZLI 2141-000, which may be due to the presence of BCH in place of CB component in the latter. A linear relation is observed between birefringence (Δn) and the order parameter (S). The normalized polarizabilities: e/ < >, o /< > and the order parameter S agree fairly well with those obtained using modified model.
Page(s): 524-531
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.44(07) [July 2006]

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