Dielectric properties of surface stabilized ferroelectric liquid crystal mixture - Effects of dichroic dye

Abstract

657-666<span style="font-size:14.0pt;line-height: 115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" color:black;mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:="" hi"="" lang="EN-IN">The dielectric permittivity of ferroelectric liquid crystal mixture FLC-6980 doped with a low concentration of anthraquinone dye has been studied. The complex permittivity has been measured in the frequency range 100 Hz to 1MHz in SmC* and SmA phase. We report the observation of relaxation modes. Dielectric increments and the relaxation frequencies at various temperatures have also been evaluated. Our results indicate that the relaxation frequency and the SmC*-SmA transition temperature TC*A decrease whereas the dielectric increment increases by about 2.5 times on ~2 % wt/wt dye addition.</span