Features of Structural, Electrokinetic and Energy State Characteristics of V x+yCo1-ySb3 Skutterudite

  • L.P. Romaka Ivan Franko National University of Lviv
  • Yu.V. Stadnyk Ivan Franko National University of Lviv
  • V.А. Romaka Ya. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, NAS of Ukraine
  • A.M. Horyn Ivan Franko National University of Lviv
Keywords: crystal structure, electrical resistivity, thermopower coefficient

Abstract

The structure characteristics, temperature and concentration dependences of the electrical resistivity and the thermopower coefficient for the Vx+yCo1-ySb3 skutterudite were investigated in the ranges: T = 80 - 400 K, x = 0.02 - 0.20. It was shown that the introduction of V atoms into the structure of CoSb3 thermoelectric material was accompanied by an increase in the efficiency of conversion of thermal energy into electrical energy. It was established that the inversion in the sign of the thermopower coefficient for Vx+yCo1-ySb3 not observed for these concentrations of V impurity atoms. Based on the analysis of electrokinetic and energy state characteristics of Vx+yCo1-ySb3, it was assumed that the V (3d34s2) impurity atoms simultaneously replaced Co (3d74s2)atoms, generating structural defects of acceptor nature, and were located in the icosahedral voids of the crystal structure and generated donors. 

References

E. Bauer, A. Grytsiv, X. Chen, N. Melnychenko-Koblyuk, G. Hilscher, H. Kaldarar, H. Michor, E. Royanian, G. Giester, M. Rotter, R. Podloucky, P. Rogl, Rev. Letter 99, 217001 (2007).

C. Chen, L. Zhang, J. Li, F. Yu, D. Yu, Y. Tian, B. Xu, J. Alloys Compd. 699, 751 (2017).

Q. Zhang, C. Chen, Y. Kang, X. Li, L. Zhang, D. Yu, Y. Tian, B. Xu, Materials Letters 143, 41 (2015).

J. Yang, B. Xu, L. Zhang, Y. Liu, D. Yu, Z. Liu, J. He, Y. Tian, Materials Letters 98, 171 (2013).

X. Li, Q. Zhang, Y. Kang, C. Chen, L. Zhang, D. Yu, Y. Tian, B. Xu, J. Alloys Compd. 677, 61 (2016).

M. Chitroub, F. Besse, H. Scherrer, J. Alloys Compd. 467(1–2), 31 (2009).

L. Deng, L.B. Wang, X.P. Jia, H.A. Ma, J.M. Qin, Y.C. Wan, J. Alloys Compd. 602, 117 (2014).

H. Liu, H. Gao, Y. Gu, X. Zhao, Journal of Rare Earths 29(6), 596 (2011).

I.-H. Kim, S.-C.Ur. Materials Letters 61(11–12), 2446 (2007).

T. Roisnel, J. Rodriguez-Carvajal, Mater. Sci. Forum, Proc. EPDIC7, 378-381, 118 (2001).

W. Jeitschko, D. Braun, Acta Crystall ogr. B. 33(11), 3401 (1977).

V.A. Romaka, V.V. Romaka, Ju.V. Stadnik, Іntermetalіchnі napіvprovіdniki: vlastivostі ta zastosuvannja (L'vіvs'ka polіtehnіka, L'vіv, 2011).

B.I. Shklovskij, A.L. Jefros, Jelektronnye svojstva legirovannyh poluprovodnikov (Nauka, Moskva, 1979).

N. Mott, Je. Djevis, Jelektronnye processy v nekristallicheskih veshhestvah (Mir, Moskva, 1982).

Published
2017-09-15
How to Cite
Romaka, L., Stadnyk, Y., Romaka, V., & Horyn, A. (2017). Features of Structural, Electrokinetic and Energy State Characteristics of V x+yCo1-ySb3 Skutterudite. Physics and Chemistry of Solid State, 18(3), 328-333. https://doi.org/10.15330/pcss.18.3.328-333
Section
Scientific articles

Most read articles by the same author(s)