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Thermoelectric properties of Bi-FeSb2 nanocomposites: Evidence for phonon-drag effect

Published online by Cambridge University Press:  18 December 2012

Mani Pokharel ,
Machhindra Koirala ,
Huaizhou Zhao ,
Kevin Lukas ,
Zhifeng Ren  and
Cyril Opeil
Mani Pokharel
Affiliation:
Department of Physics, Boston College, Chestnut Hill MA 02467
Machhindra Koirala
Affiliation:
Department of Physics, Boston College, Chestnut Hill MA 02467
Huaizhou Zhao
Affiliation:
Department of Physics, Boston College, Chestnut Hill MA 02467
Kevin Lukas
Affiliation:
Department of Physics, Boston College, Chestnut Hill MA 02467
Zhifeng Ren
Affiliation:
Department of Physics, Boston College, Chestnut Hill MA 02467
Cyril Opeil
Affiliation:
Department of Physics, Boston College, Chestnut Hill MA 02467
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Abstract

The thermoelectric properties of Bi-FeSb2 nanocomposites are reported. The electrical resistivity and the Seebeck coefficient measurements show a significant dependence on bismuth concentration. Our results reveal that the shifting of the Seebeck peak in FeSb2 nanocomposites is purely a grain size-effect. The thermal conductivity data indicates a presence of an electron-phonon interaction. Over all, our analysis of the the thermoelectric properties of Bi-FeSb2 nanocomposites provide additional evidence for phonon-drag in FeSb2.

Keywords

thermoelectricthermoelectricitythermal conductivity

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