20.500.12556/DKUM-94372 Ferroelectric nematics: materials with high permittivity or low resistivity? Two models have recently been proposed to describe dielectric spectroscopy measurements of ferroelectric nematics (NF) in thin planar capacitors. The polarisation-external capacitance Goldstone reorientation mode (PCG model) considers the NF layer between the electrodes as an effective low resistivity material; the resistivity is inversely proportional to the square of polarisation magnitude. The ‘high-ε’ model considers the NF material as having a huge permittivity due to the ease of polarisation rotation. We study implications of both models and show, why both models describe the majority of the observed dielectric spectroscopy results equally well. We point out differences among the models’ predictions and explain why some observations can be explained only by the high-� model. The high-� model predicts that the frequency range within which capacitors filled with NF material effectively store energy can be increased by using thicker cells, while within the PCG model this frequency range reduces with increasing capacitor thickness. Within both models, a crucial parameter that determines the behaviour of the capacitors filled with an NF material is parasitic resistance, primarily due to the electrode resistance. We present measurements of electrode resistance and find that in ITO cells it is of the order of few hundred ohms. ferroelectric nematics dielectric measurements high-permittivity model electrode resistance odpornost elektrode dielektrične meritve feroelektrični nematiki dielektričniosti true false true Taylor & Francis Group Angleški jezik Slovenski jezik https://www.tandfonline.com/journals/tlct20 © 2025 The Author(s) Članek v reviji 2025-08-14 11:55:34 2025-08-14 11:55:34 2026-01-22 13:05:49 0000-00-00 00:00:00 2025 0 0 13 str. Published online: 31 Mar 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-11-23 2025-03-09 2025-03-31 621.317 231098115 10.1080/02678292.2025.2484234 1366-5855 Ferroelectric_nematics__materials_with_high_permittivity_or_low_resistivity_.pdf Ferroelectric_nematics__materials_with_high_permittivity_or_low_resistivity_.pdf 1 0C95E42B09D9AE0B8A4227EA7332C4C8 56b9e82f87d04b96a0c279166f79c7b1cbf72acfc512dd8bddc53690d8e3d016 294c719a-78f5-11f0-a99e-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=195330 https://www.tandfonline.com/doi/full/10.1080/02678292.2025.2484234#abstract 0 b085d25c-f78a-11f0-a060-00155d00018d https://dk.um.si/Dokument.php?lang=slv&id=202408 Fakulteta za elektrotehniko, računalništvo in informatiko Fakulteta za naravoslovje in matematiko 0 0 0