Eur. Phys. J. AP
Volume 9, Number 1, January 2000
|Page(s)||25 - 28|
|Published online||15 January 2000|
Confrontation between noise and dielectric measurements on a liquid crystal in the paraelectric SA and ferroelectric SC* phases
Laboratoire d'Étude des Matériaux et des Composants pour l'Electronique, Université du
Littoral Côte d'Opale,
19 rue Louis David, B.P. 717, 62228 Calais, France
2 Centre de Recherche Paul Pascal, Université de Bordeaux I, avenue Schweitzer, 33600 Pessac, France
Corresponding author: email@example.com
Revised: 21 October 1999
Accepted: 21 October 1999
Published online: 15 January 2000
Dielectric and noise measurements versus frequency have been performed on a liquid crystal in the paraelectric SA and ferroelectric phases. A confrontation of these measurements is presented on the basis of the fluctuation-dissipation theorem which shows that these techniques both give similar results linked to the observation of the classical soft mode and Goldstone mode in the SA and phases respectively.
PACS: 61.30.Gd – Orientational order of liquid crystals; electric and magnetic field effects on order / 74.40.+k – Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.) / 77.22.Gm – Dielectric loss and relaxation
© EDP Sciences, 2000
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