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Title
Zr doped -rhombohedral boron: widely variable Seebeck coefficient and structural properties
AuthorSologub, Oksana ; Salamakha, Leonid ; Stöger, Berthold ; Michiue, Yuichi ; Mori, Takao
Published in
Acta Materialia, 2017, Vol. 122, page 378-385
PublishedElsevier, 2017
Edition
Submitted version
LanguageEnglish
Document typeJournal Article
Keywords (EN)-rhombohedral boron / Zr-doping / p/n transition
Project-/ReportnumberAustrian Science Fund (FWF): V279-N19
ISSN1359-6454
URNurn:nbn:at:at-ubtuw:3-3289 Persistent Identifier (URN)
DOI10.1016/j.actamat.2016.10.014 
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Abstract (English)

The doping effect of zirconium on the structure, Seebeck coefficient and electrical resistivity of -rhombohedral B was studied for the metal rich concentration range ZrxB100-x, 1.88x2.75. Structural studies proved the Zr atoms mainly in E and D voids for the metal rich compositions, and also elucidated the minor Zr occupancies of the N, F and A1 holes. Seebeck coefficients were effectively shifted within a wide range of positive and negative values by varying the Zr content (p-type: Smax +420 VK-1 at 673 K for x=1.88; n-type: Smax -670 VK-1 at 473 K for x=2.74). Electrical resistivities generally followed the Motts relation for the variable-range hopping. Excellent compositional agreement has been observed between structural and thermoelectric properties discontinuities.

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