Influence of carbon nanotubes on thermoelectric properties of p- and n-type Heusler alloys
Elsehly EM 1,2, El-Khouly A.1,2, Hassan Mohamed Asran2, Novitskii A. P. 2, Karpenkov D. Yu. 3, Pashkova D. S.2, Chechenin NG 4, Uchimoto T.5, Miki H.5, Parkhomenko Yu. N. 3,6, Khovaylo V.V. 2,7
1Physics Department, Faculty of Science, Damanhour University, Damanhour, Egypt
2National University of Science and Technology MISiS, Moscow, Russia
3Department of Physics, Lomonosov Moscow State University, Moscow, Russia
4Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia
5Institute of Fluid Science, Tohoku University, Sendai, Japan
6Joint Stock Company “Giredmet”, Moscow, Russia
7Belgorod National Research University, Belgorod, Russia
Email: elsehlyfigo@yahoo.com, chechenin@sinp.msu.ru, khovaylo@misis.ru

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This paper presents the results of studying the effect of carbon nanotubes on thermoelectric properties of p-type (Nb0.6Ta0.4)0.8Ti0.2FeSb and n-type Ti0.5Zr0.25Hf0.25NiSn half Heusler alloys. The experimental data obtained indicate a strong effect of the carbon nanotubes on electrical conductivity and Seebeck coefficient of the n-type compound, while the changes in these properties in the p-type compound were significantly less. It is suggested that a possible reason for this difference is the formation of a conducting cluster of carbon nanotubes in the sample of the n-type Heusler alloy. Keywords: carbon nanotubes, thermoelectric properties, Heusler alloys, electrical conductivity, Seebeck coefficient.
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