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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:31 |
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Conference: Bucharest University Faculty of Physics 2003 Meeting
Section: Solid State Physics and Materials Science
Title:
Temperature Dependent Deviations from the Summerfield Scaling of Conductivity Spectra in KCl:In crystals
Authors:
Ana Ioanid
Affiliation:
Faculty of Physics, University of Bucharest
E-mail
Keywords:
Abstract:
Isotherms of the real part of the conductivity in KCl:In crystals in the 200Hz - 1.4MHz frequency range and 300 - 500K temperature range have been scaled according to the Summerfield scaling law, i.e., by scaling the frequency axis with the product of temperature and the dc conductivity and the ac conductivity axis by the dc conductivity. The application of this scaling does not lead to a superposition of the isotherms, but the isotherms are shifted to higher values of the new argument as the temperature decreases. The isotherms, however, do collaps onto a single master curve when an additional scaling factor as an exponent of the temperature depending of temperature is used for frequency axix. Both the temperature dependence and the values of this exponent agree with the concentration of the stabilized structural defects determined from the frequency dependence of the conductivity.
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