Abstract
Ternary metallic alloy Fe2VAl with a pseudogap in its energy band structure has received intensive scrutiny for potential thermoelectric applications. Due to the sharp change in the density of states profile near the Fermi level, interesting transport properties can be triggered to render possible enhancement in the overall thermoelectric performance. Previously, this full-Heusler-type alloy was partially doped with cobalt at the iron sites to produce a series of compounds with n-type conductivity. Their thermoelectric properties in the temperature range of 300 K to 850 K were reported. In this research, efforts were made to extend the investigation on (Fe1−x Co x )2VAl to the low-temperature range. Alloy samples were prepared by arc-melting and annealing. Seebeck coefficient, electrical resistivity, and thermal conductivity measurements were performed from 80 K to room temperature. The effects of cobalt doping on the material’s electronic and thermal properties are discussed.
Similar content being viewed by others
References
Y. Nishino, M. Kato, S. Asano, K. Soda, M. Hayasaki, and U. Mizutani, Phys. Rev. Lett. 79, 1909 (1997).
W.M. Weinert and R.E. Watson, Phys. Rev. B 58, 9732 (1998).
E.J. Skoug, C. Zhou, Y. Pei, and D.T. Morelli, J. Electron. Mater. 38, 1221 (2009).
Y. Nishino, S. Deguchi, and U. Mizutani, Phys. Rev. B 74, 115115 (2006).
H. Matsuura, Y. Nishino, U. Mizutani, and S. Asano, J. Jpn. Inst. Met. 66, 767 (2002).
H. Nakayama, N. Ide, and Y. Nishino, Mater. Trans. 49, 1858 (2008).
W. Lu, W. Zhang, and L. Chen, J. Alloys Compd. 484, 812 (2009).
Y. Nishino, H. Kato, and M. Kato, Phys. Rev. B 63, 233303 (2001).
C.S. Lue and Y.K. Kuo, Phys. Rev. B 75, 064204 (2007).
J. Yang, D. Morelli, G. Meisner, W. Chen, J. Dyck, and C. Uher, Phys. Rev. B 67, 165207 (2003).
M. Mikami and K. Kobayashi, J. Alloys Compd. 466, 530 (2008).
M. Mikami, A. Matsumoto, and K. Kobayashi, J. Alloys Compd. 461, 423 (2008).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Liu, C., Morelli, D.T. Low-Temperature Thermoelectric Properties of Fe2VAl with Partial Cobalt Doping. J. Electron. Mater. 41, 1632–1635 (2012). https://doi.org/10.1007/s11664-012-2025-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11664-012-2025-6