Bulk conductivity and polarization of ionic crystals exhibiting defect exchange between inequivalent sites

The bulk conductivity of ionically conducting crystals in which Schottky or Frenkel defects jump between inequivalent sites can be appreciably more complex than that of simpler materials. An equivalent electrical circuit is derived to describe the bulk ac response of crystals of the tysonite type. T...

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Bibliographic Details
Published in:Solid state ionics 1984, Vol.11 (4), p.285-291
Main Authors: Franceschetti, Donald R., Shipe, Paul C.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Diffusion in solids
Exact sciences and technology
Physics
Self-diffusion and ionic conduction in nonmetals
Transport properties of condensed matter (nonelectronic)
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Summary:The bulk conductivity of ionically conducting crystals in which Schottky or Frenkel defects jump between inequivalent sites can be appreciably more complex than that of simpler materials. An equivalent electrical circuit is derived to describe the bulk ac response of crystals of the tysonite type. The circuit has the form of a two-component Maxwell-Wagner capacitor and includes a capacitative element which represents a frequency-dependent bulk polarization not associated with dipolar complexes. The application of the model to LaF 3 is discussed.
ISSN:0167-2738
1872-7689
DOI:10.1016/0167-2738(84)90018-3