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A.C. Conductivity of Ag Incorporated Se-Te-Bi Glassy Alloy

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Author(s): Anup Kumar | Pawan Heera | Raman Sharma

Journal: Journal of Nano- and Electronic Physics
ISSN 2077-6772

Volume: 5;
Issue: 2;
Start page: 02020-1;
Date: 2013;
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Keywords: A | C | conductivity | Chalcogenide glasses | Activation energy | Frequency exponen

ABSTRACT
Effect of Ag addition on the a.c. conductivity as a function of frequency in Se80.5Bi1.5Te18 – yAgy (y  1.0, 1.5 and 2.0 at. %) glassy alloy has been investigated in the temperature range 300-355 K. The electrical conductivity is measured as a function of frequency () of an alternating electric field in the frequency range 1 -500 kHz, using Wayne Kerr 6500 B Impedance Analyzer. A.C. conductivity (ω) is found to increases with an increase in frequency for the entire range of temperature in all compositions. The frequency exponent s is found to decrease with an increase in temperature which indicates that the correlated barrier hopping is the possible conduction mechanism in the investigated samples.
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