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Abstract
A novel method for temperature dependence of order parameter calculations at different wavelengths through birefringence measurements for ferroelectric liquid crystals (S)-(-)-2-methylbutyl 4′-(4″-n-alkanoyloxy benzoyloxy) biphenyl-4-carboxylates (where n = 16 and 18) has been proposed using image analysis and linear regression method of Kuczynski equation. Measurements are made for its liquid crystal phases (SmecticC*, SmecticA) to the isotropic phase of the sample. The birefringence values of the samples at different wavelengths are obtained from the textural analysis of liquid crystal as a function of temperature using MATLAB software.
Acknowledgements
The authors gratefully acknowledge the Project No.: ERIP/ER/0703688/M/01/1134, dated 31-03-2010 of DRDO, UGC DRS LEVEL III programme No.F.530/1/DRS/2009 (SAP-I), dated 09-02-2009 and DST FIST programme No. DST/FST/PSI – 002/2011 dated 20-12-2011, New Delhi, to the Department of Physics, ANU for providing financial assistance. S.T. Ha wishes to thank Universiti Tunku Abdul Rahman for a grant from the UTAR Research Fund (6200H10).