The paper considers several examples of non-Debye dielectric response in complex heterogeneous media. The percolation phenomenon and Cole-Cole relaxation in disordered matter are discussed in detail. The models enable us to establish the relationship between the parameters of dielectric relaxation broadening, structural properties of the media and transport features of charge carriers in the considered systems. In addition, the origins of "strange kinetic" phenomena and the specific features of relaxation kinetics in systems with different kinds of confinements are discussed in the paper. In contrast to the usual Arrhenius or Vogel-Fulcher-Tammann patterns, a quite unusual non-monotonic dependence of relaxation time versus temperature is observed in such systems. Based on the free volume concept, a model for this type of kinetics was illustrated by several particular examples: water confined in porous glasses and doped ferroelectric crystal.
|Original language||American English|
|Title of host publication||Slow Dynamics in Complex Systems|
|Subtitle of host publication||3rd International Symposium on Slow Dynamics in Complex Systems|
|Editors||Michio Tokuyama, Irwin Oppenheim|
|Publisher||American Institute of Physics Inc.|
|Number of pages||6|
|State||Published - 30 Apr 2004|
|Event||3rd International Symposium on Slow Dynamics in Complex Systems - Sendai, Japan|
Duration: 3 Nov 2003 → 8 Nov 2003
|Name||AIP Conference Proceedings|
|Conference||3rd International Symposium on Slow Dynamics in Complex Systems|
|Period||3/11/03 → 8/11/03|
Bibliographical notePublisher Copyright:
© 2004 American Institute of Physics.