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Electrical Properties of Ge30–x Se70Sn x (x = 8, 11, 14, 17 and 20) Glasses with Temperature

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Temperature dependence of DC electrical conductivity has been studied for Ge30–x Se70Sn x (x = 8, 11, 14, 17 and 20) glassy thin pellets of diameter 12 mm and thickness 1 mm, in bulk form through I-V characteristics. The pellets have been made from the ingots of the glasses, prepared in bulk form, using the well-known melt quenching technique. Keithley High Resistance Meter/Electrometer 6517A in FVMI (Force Voltage Measure Current) mode has been used for the recording of I–V characteristics. The experimental data suggests that at all temperatures, the glass containing 20 at.% of Sn has the minimum resistance allowing maximum current through the sample as compared to other members of the series. Therefore, the composition having value x = 20, may be taken as the critical composition in the present studied series. It is observed that the electrical conductivity increases with increasing temperature which illustrates that these samples are semiconducting in nature. The linear relationship between In (I) and V 1/2 strongly suggests the type of conduction as Pool-Frenkel for both low and high voltage range, in these glasses.
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Keywords: DC Electrical Conductivity; Glasses; Ohmic Behavior; Pool-Frenkel Mechanism; Semiconducting

Document Type: Research Article

Affiliations: Semi-Conductor and Polymer Science Laboratory, Department of Physics, University of Rajasthan, Jaipur 302004, India

Publication date: November 1, 2016

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