Low-frequency dielectric spectroscopy of liquid crystalline materials due to ac or step voltage excitations

Aleksander B. Szymanski; Wiktor L. Szymanski

doi:10.1117/12.385672

12 May 2000 Low-frequency dielectric spectroscopy of liquid crystalline materials due to ac or step voltage excitations

Aleksander B. Szymanski, Wiktor L. Szymanski

Proceedings Volume 4147, Liquid Crystals: Chemistry, Physics, and Applications; (2000) https://doi.org/10.1117/12.385672
Event: XIII International Conference on Liquid Crystals: Chemistry, Physics, and Applications, 1999, Krynica Zdroj, Poland

Abstract

The aim of this contribution is to discuss the problem of low frequency electrical conductivity of mesomorphic materials. The subject may be studied in Time Domain technique by means of the excitation of the sample by step voltage pulse. The application of alternating voltage wave is nowadays realized by means of the use of Frequency Range Analyzers. Thus, one can compare the results obtained by means of the methods indicated above. It is assumed that in `small signal case' the results should be equivalent. There exists considerable experimental evidence, that these methods are producing results, which are not in agreement, even, at lowest signals used in experiment. A possible explanation of this discrepancy is proposed.

Citation Download Citation

Aleksander B. Szymanski and Wiktor L. Szymanski "Low-frequency dielectric spectroscopy of liquid crystalline materials due to ac or step voltage excitations", Proc. SPIE 4147, Liquid Crystals: Chemistry, Physics, and Applications, (12 May 2000); https://doi.org/10.1117/12.385672

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