Off-stoichiometric effect on the transport and pseudogap characteristics of Fe2 VGa

C. S. Lue, W. J. Lai, C. C. Chen, Y. K. Kuo

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20 引文 斯高帕斯(Scopus)

摘要

We report the investigations of transport and thermoelectric measurements on the Heusler compounds Fe2VGa1-x over the temperature range from 10 to 300 K. It is found that the electrical resistivity and Seebeck coefficient are very sensitive to the off-stoichiometry, while the thermal conductivity is relatively little affected with the composition change. With a removal of Ga content from the stoichiometric Fe2VGa, a sign change in the Seebeck coefficient accompanied by a broad minimum at around 130 K is observed. The latter feature can be interpreted as thermal excitation of carriers across band edges, in accord with band-structure calculations. Furthermore, an analysis of lattice thermal conductivity indicates that the off-stoichiometric effect on both electrical resistivity and Seebeck coefficient is not influenced by chemical disorder.

原文English
頁(從 - 到)4283-4290
頁數8
期刊Journal of Physics Condensed Matter
16
發行號24
DOIs
出版狀態Published - 2004 6月 23

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學

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