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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.43 [2005] >
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 Code: | G01R 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 0.11 10-3 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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