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|Title:||Ionic contribution to the dielectric properties of a nematic liquid crystal in thin cells|
|Publisher:||The American Institute of Physics|
|Citation:||Journal of Applied Physics, 2001, Vol.90, p3483-3488|
|Abstract:||We report measurements on dielectric properties of a nematic liquid crystal in planar aligned cells with two different thicknesses (1.2 and 6.7 µm). The nematic has a wide thermal range and the temperature variation of the effective dielectric constant (epsilon[perpendicular]) of the thick cell reflects that of the orientational order parameter. On the other hand, the thin cell exhibits a higher value of epsilon[perpendicular] which is essentially temperature independent. We have conducted detailed dielectric measurements in the frequency range of 10 Hz–1.1 kHz on both the cells and analyzed the data using a simplified model which takes into account the ionic contribution. It leads to an estimation of the temperature dependencies of the number density and diffusion coefficient of the impurity ions.|
|Copyright:||(2001) by the American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.|
|Appears in Collections:||Research Papers (SCM)|
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