Abstract
In this paper, the static Kerr effect was investigated for the W-1680 at temperatures above the nematic–isotropic transition temperature and compared with 9CHBT. We experimentally measured the electro-optical Kerr constant and the pre-transitional behavior. The Kerr law has been confirmed and the variation of the inverse Kerr constant, with a temperature above the smectic–isotropic transition temperatures, were determined. The linear dependence of (T − T*) − 1 on the Kerr constant is found to be in good agreement with the predications of the Landau–De Gennes model. Additionally, the temperature dependence of third order susceptibility has been studied. This value for these samples will reduce when the temperature increases.
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