Electrical and thermoelectric properties of Cu0.75Ni0.125FeTe2

The electrical conductivity, Hall coefficient, and thermopower of Cu 0.75 Ni 0.125 FeTe 2 have been measured between 80 and 500 K. The results have been interpreted in terms of a three-band model which takes into account, in addition to the conduction band, two overlapping valence subbands. We have...

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Bibliographic Details
Published in:Inorganic materials 2008-02, Vol.44 (2), p.115-120
Main Authors: Aliev, F. F., Guseinov, G. G., Pashaev, G. P., Agamirzoeva, G. M., Magerramov, A. B.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
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Summary:The electrical conductivity, Hall coefficient, and thermopower of Cu 0.75 Ni 0.125 FeTe 2 have been measured between 80 and 500 K. The results have been interpreted in terms of a three-band model which takes into account, in addition to the conduction band, two overlapping valence subbands. We have determined the energy spacing between the subbands (Δ 0 K = 0.002 eV), its temperature coefficient ( d Δ/ dT = 1 × 10 −4 eV/K), and the effective masses of the heavy and light holes and electrons. With the interband scattering of light holes taken into account, the conductivity has a minimum at ∼190 K.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168508020064