Anisotropy of the thermopower in higher silicide of transitions metals
- Autores: Kusnetsova V.1,2, Zaitsev V.1, Solomkin F.1, Novikov S.1
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Afiliações:
- Ioffe Institute
- St. Petersburg Academic University
- Edição: Volume 51, Nº 8 (2017)
- Páginas: 972-975
- Seção: XV International Conference “Thermoelectrics and Their Applications—2016”, St. Petersburg, November 15–16, 2016
- URL: https://journals.rcsi.science/1063-7826/article/view/200685
- DOI: https://doi.org/10.1134/S1063782617080188
- ID: 200685
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Resumo
A new technique for measuring the thermopower anisotropy using polycrystals on the basis of repeated measurements of an array of randomly oriented microcrystals and statistical analysis of the data obtained is proposed. The thermopower anisotropy of a series of higher silicides of transition metals (β-FeSi2, doped MnSi1.75, ReSi1.75, and CrSi2) is measured using polycrystals. It is found that, in β-FeSi2 crystals, a very high thermopower anisotropy can be observed; in ReSi1.75 crystals, the thermopower can have different signs; and, in CrSi2, the absolute value of the thermopower depends heavily on the heat-treatment mode. The temperature dependences of the electrical conductivity and thermopower of CrSi2 needles are measured. The thermopower anisotropy in CrSi2 needles, as in bulk single crystals, is retained in a wide temperature range.
Sobre autores
V. Kusnetsova
Ioffe Institute; St. Petersburg Academic University
Autor responsável pela correspondência
Email: vicha_110901@mail.ru
Rússia, St. Petersburg, 194021; St. Petersburg, 194021
V. Zaitsev
Ioffe Institute
Email: vicha_110901@mail.ru
Rússia, St. Petersburg, 194021
F. Solomkin
Ioffe Institute
Email: vicha_110901@mail.ru
Rússia, St. Petersburg, 194021
S. Novikov
Ioffe Institute
Email: vicha_110901@mail.ru
Rússia, St. Petersburg, 194021