https://doi.org/10.1051/epjap:2000195
Confrontation between noise and dielectric measurements on a liquid crystal in the paraelectric SA and ferroelectric SC* phases
1
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: douali@opale.univ-littoral.fr
Received:
10
March
1999
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
