Analysis of complex dielectric spectra. I. One-dimensional derivative techniques and three-dimensional modelling

Several strategies for the analysis of isochronal and isothermal spectra as well as complete three-dimensional (3D) spectra are outlined and applied to data of (glass forming) liquids and polymers. Conduction-free loss spectra are calculated using a compact solution of the Kramers–Kronig transformat...

Full description

Saved in:
Bibliographic Details
Published in:Journal of non-crystalline solids 2002-07, Vol.305 (1), p.40-49
Main Authors: Wübbenhorst, Michael, van Turnhout, Jan
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectric loss and relaxation
Dielectric properties of solids and liquids
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Several strategies for the analysis of isochronal and isothermal spectra as well as complete three-dimensional (3D) spectra are outlined and applied to data of (glass forming) liquids and polymers. Conduction-free loss spectra are calculated using a compact solution of the Kramers–Kronig transformation and an approximation based on ∂ε ′/ ∂ ln ω . The usefulness of the dielectric modulus for data analysis is also evaluated. Apart from ∂ε ′/ ∂ ln ω , other useful derivatives in the frequency and temperature domain are treated as well. Finally, we describe the evaluation of 3D-relaxation maps by means of 3D fitting.
ISSN:0022-3093
1873-4812
DOI:10.1016/S0022-3093(02)01086-4