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Effect of an azo dye (DR1) on the dielectric parameters of a nematic liquid crystal system |
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| Authors: | S zder M Okutan O Kysal H Gkta SE San |
| Institution: | aDepartement of Physics, Çanakkale Onsekiz Mart University, 17100 Çanakkale, Turkey bDepartment of Physics, Gebze Institute of Technology, P.O. Box 141, 41400 Gebze, Kocaeli, Turkey cNuclear Research and Training Center, 06983 Saray, Ankara, Turkey |
| Abstract: | The dielectric parameters and relaxation properties of azo dye (DR1) doped E7 and pure E7 liquid crystal (LC) have been investigated in a wide frequency range of 10 k–10 MHz through the dielectric spectroscopy method at room temperature. Dielectric anisotropy (Δε) property of the LC changes from the positive type to negative type and dielectric anisotropy values decrease with doping of DR1. The relaxation frequency fr of E7 and E7/DR1 LC was calculated by means of Cole–Cole plots. Influence of bias voltage on the dielectric parameters has also been investigated. |
| Keywords: | Liquid crystals Azo dye Dielectric spectroscopy Relaxation frequency |
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