References
- Leslie , F. M. 1968 . Proc. Roy. Soc. A , 307 : 359
- Jayaram , H. K. , Kini , U. D. , Ranganath , G. S. and Chandrasekhar , S. 1983 . Mol. Cryst. Liq. Cryst. , 99 : 155
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- Kozawaguchi , H. and Wada , M. 1975 . Jap. J. Appl. Phys. , 14 : 651
- The measured birefringence in Fig. 1. is a superposition of Eq.3. and a background which is different for each sample. It is related to the unsatisfying sample quality, like birefringence of the glasses, imperfect orientation, etc.