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The Migration Concept for Ionic Motion in Materials With Disordered Structures

Published online by Cambridge University Press:  11 February 2011

K. Funke  and
R. D. Banhatti
K. Funke
Affiliation:
University of Münster, Institute of Physical Chemistry and Sonderforschungsbereich 458, Schlossplatz 4, D – 48149 Münster, Germany, E-mail: K.Funke@uni-muenster.de and banhatt@uni-muenster.de
R. D. Banhatti
Affiliation:
University of Münster, Institute of Physical Chemistry and Sonderforschungsbereich 458, Schlossplatz 4, D – 48149 Münster, Germany, E-mail: K.Funke@uni-muenster.de and banhatt@uni-muenster.de
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Abstract

The dynamics of the mobile ions in materials with disordered structures are a challengingly complicated many-particle process. In this paper, we consider characteristic frequency-dependent conductivities and permittivities of such materials and show that they can be well reproduced within the framework of the MIGRATION concept. The meaning of the acronym is MIsmatch Generated Relaxation for the Accommodation and Transport of IONs. In the MIGRATION concept, we attempt to grasp the essence of the ion dynamics in a simple set of rules which convey a physical picture of the most relevant elementary processes. The rules are expressed in terms of three coupled rate equations which then form the basis for deriving frequency-dependent model conductivities and permittivities.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 756: Symposia EE/FF – Solid-State Ionics – Materials for Fuel Cells and Fuel Processors , 2002 , EE1.1
Copyright
Copyright © Materials Research Society 2003

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References

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