F. V. Podgornov, A. M. Gavrilyak, M. V. Gavrilyak, “The role of impurity ions in nonlinear dielectric response formation of nematic liquid crystal cell”, Vestn. Yuzhno-Ural. Gos. Un-ta. Ser. Matem. Mekh. Fiz., 2025, Volume 17, Issue 3,Pages <nobr>61

Physics

The role of impurity ions in nonlinear dielectric response formation of nematic liquid crystal cell

F. V. Podgornov^a, A. M. Gavrilyak^a, M. V. Gavrilyak^ab

^a South Ural State University, Chelyabinsk, Russian Federation
^b Institute of Electrophysics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russian Federation

Abstract: The study considers the nonlinear dielectric response of a nematic liquid crystal (NLC). Odd harmonics are found in the dielectric response in the low-frequency region of the spectrum from 0.5 mHz to 600 Hz. The transporting of impurity ions causes two relaxation effects: space charge polarization and the formation of electric double layers.

Keywords: nematic liquid crystals, impurity ions, space charge polarization, double electric layers, nonlinear dielectric spectroscopy.

UDC: 538.956, 544.252.22

Received: 05.07.2025

DOI: 10.14529/mmph250307