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Semiconductor Physics, Quantum Electronics & Optoelectronics. 2005. V. 8, N 3. P. 045-049.
Dielectric relaxation in Se80Ge20 and Se75Ge20Ag5 chalcogenide glasses
1Department of Physics, P. P. N. College, Kanpur-01, India
Abstract. Temperature and frequency dependence of dielectric constant (ε') and
dielectric loss (ε") are studied in glassy Se80Ge20 and Se75Ge20Ag5. The measurements
have been made in the frequency range (1 to 10 kHz) and in the temperature range 300 to
395 K. No dielectric dispersion is observed in glassy Se80Ge20. However, the results
indicate that the dielectric dispersion exists in Se75Ge20Ag5 in the above frequency and
temperature range. An analysis of the dielectric loss data shows that the Guintini theory
of dielectric dispersion based on two electron hopping over a potential barrier is
applicable in the present case.
Keywords: chalcogenide glass, dielectric constant, dielectric relaxation.
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