The effects of thermal activation on the complex conductivity of Ag2HgI4 in the microwave region |
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Authors: | T Wong M Brodwin JI McOmber DF Shriver |
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Institution: | Department of Electrical Engineering and Computer Science, Northwestern University Evanston, IL 60201, USA;Department of Chemistry, Northwestern University Evanston, IL 60201, USA |
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Abstract: | The complex conductivity of polycrystalline Ag2HgI4, a superionic conductor, has been measured as a function of temperature at 10, 24 and 70 GHz. Both conductivity and permittivity exhibited sharp changes at the β?α phase transition. The microwave conductivity of the β-phase was found to be insensitive to temperature changes and that of the α-phase has thermal activation energies lower than that of dc. The observed monotonic increasing conductivity, decreasing permittivity, together with thermal activation effects are indicative of hopping ionic transport. |
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