Frequency‐Dependent Conductivities of RbAg4I5 and Na‐β″‐Alumina from Radio to FIR Frequencies
- 1 September 1991
- journal article
- research article
- Published by Wiley in Berichte der Bunsengesellschaft für physikalische Chemie
- Vol. 95 (9) , 1025-1028
- https://doi.org/10.1002/bbpc.19910950914
Abstract
The electric conductivities of the two fast ionic conductors RbAg4I5 and Na‐β″‐alumina have been determined at various temperatures and frequencies from 4 MHz to 105 GHz. – The conductivity of RbAg4I5 is found to display a dispersion as expected by the so‐called “universal dynamic” response, a high‐frequency plateau in the range of 100 GHz and an Arrhenius behaviour at both low and high frequencies. – The spectra of Na‐β″‐alumima show a different behaviour. In addition to the “universal dynamic” response dispersion, a faster and thermally less activated relaxation process is observed at high frequencies and low temperatures. Up to 60 GHz, a high‐frequency plateau has not been encountered.Keywords
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