Journal ArticleDOI
On the molecular interpretation of the dielectric relaxation of nematic liquid crystals
TLDR
In this paper, the authors presented the results of studies of the dielectric relaxation of 6CHBT obtained for different values of the angle between the directions of the macroscopic orientation of the sample (director n) and the probing electric field E. A model of the molecular dynamics in the oriented nematics is proposed.Abstract:
This paper presents the results of studies of the dielectric relaxation of nematic 6CHBT obtained for different values of the angle between the directions of the macroscopic orientation of the sample (director n) and the probing electric field E. Analysis of the evolution of the relaxation spectrum from e*‖(ω) (E‖n) to e*⊥(ω) (E⊥n)allows one to explain the hitherto existing inconsistency in the molecular interpretation of the spectra. A model of the molecular dynamics in the oriented nematics is proposed.read more
Citations
More filters
Journal ArticleDOI
Highly-anisotropic liquid-crystal mixtures for tunable microwave devices
TL;DR: In this paper, the microwave dielectric properties of novel liquid crystal (LC) mixtures were reported, specially designed for voltage-tunable microwave devices, and the figure-of-merit of a tunable microstrip-phase shifter device has been increased significantly from 20°/dB up to 110° /dB, both measured at 24 GHz.
Journal ArticleDOI
Liquid-Crystal High-Frequency Microwave Technology: Materials and Characterization
Journal ArticleDOI
Dielectric relaxation in liquid crystalline dimers
TL;DR: Ferrarini et al. as mentioned in this paper measured the real and imaginary parts of the electric permittivities of aligned samples as functions of frequency over the range 10(2)-10(9) Hz at temperatures throughout the nematic phase.
Journal ArticleDOI
Large Microwave Birefringence Liquid-Crystal Characterization for Phase-Shifter Applications
Frédéric Dubois,Freddy Krasinski,B. Splingart,Nicolas Tentillier,Christian Legrand,A. Spadło,Roman Dabrowski +6 more
TL;DR: In this paper, a large birefringence nematic liquid crystal (LBN) was used to improve the performance of a microwave liquid-crystal phase shifter.
Journal ArticleDOI
Liquid crystal phases in confined geometries
Seong Ho Ryu,Dong Ki Yoon +1 more
TL;DR: The orientation control of liquid crystal (LC) phases is essential for fundamental studies as well as practical applications as mentioned in this paper, and surface treatment and topographic confinement have emerged as two of the most effective tools to control ordering and orientation of various types of LC phases.
References
More filters
Journal ArticleDOI
Dispersion and Absorption in Dielectrics I. Alternating Current Characteristics
Kenneth S. Cole,Robert H. Cole +1 more
TL;DR: In this paper, the locus of the dielectric constant in the complex plane was defined to be a circular arc with end points on the axis of reals and center below this axis.
Journal ArticleDOI
Theory of Electric Polarization
Book
Principles of dielectrics
TL;DR: In this article, the relative permittivity of dielectrics in static and time-dependent fields is calculated for the case of static dielectric saturation in dipolar liquids.
Related Papers (5)
Dispersion and Absorption in Dielectrics I. Alternating Current Characteristics
Kenneth S. Cole,Robert H. Cole +1 more