[Zurück]

O. Sologub, L. Salamakha, B. Stöger, Y. Michiue, T. Mori:
"Zr doped b-rhombohedral boron: Widely variable Seebeck coefficient and structural properties";
Acta Materialia, 122 (2016), S. 378 - 385.

The doping effect of zirconium on the structure, Seebeck coefficient and electrical resistivity of brhombohedral B was studied for the metal rich concentration range ZrxB100 x, 1.88 x 2.75. 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 ~ þ420 mVK 1 at 673 K for x ¼ 1.88; n-type: Smax ~ 670 mVK 1 at 473 K for x ¼ 2.74). Electrical resistivities generally followed the Mott's relation for the variable-range hopping. Excellent compositional agreement has been observed
between structural and thermoelectric properties discontinuities.

http://dx.doi.org/10.1016/j.actamat.2016.10.014