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IJPAP Vol.43(07) [July 2005] >

Title: Electrical conductivity and thermoelectric power of Ge40Te60 and Ge38Sn2Te60 alloys
Authors: Ahmed, A M
Keywords: Elecrical conductivity
Thermo-electric power
Activation energy
Issue Date: Jul-2005
Publisher: CSIR
IPC CodeG01R 21/08
Abstract: The dc conductivity (s) and thermoelectric power (TEP) have been measured for the bulk binary alloy Ge40Te60 and ternary alloy Ge38Sn2Te60. X-ray diffraction confirms that the samples are polycrystalline. The measurments were carried out in the temperature range 133 < T< 400 K. Variation of electrical conductivity with ambient temperature (T) proved the  semiconductor behaviour for all range of T for both materials. With annealing time (tan), the electrical conduction activation energy (Es) has been found to be with range from 0.1110-3 eV-63.310-3 eV for Ge40Te60 and from 0.9510-3 to 52.9310-3 eV while the thermo-electric power activation energy (Eσ) has been found to be in the range 2.2810-3-39.310-3 eV and 1.5810-3-34.210-3 eV for two alloys, respectively.
Page(s): 535-541
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.43(07) [July 2005]

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