ACTA

Superconductivity and Electronic Structure of the W₇Re₁₃B Compound

A. Kowalczyk^a, B. Andrzejewski^a, A. Jezierski^a, T. Toliński^a, A. Szlaferek^a, M. Falkowski^a and G. Chełkowska^b
^aInstitute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
^bInstitute of Physics, Silesian University, Uniwersytecka 4, 40-007 Katowice, Poland

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Received: 25 09 2005;

The superconductor W₇Re₁₃B has been studied by the magnetic measurements and microwave absorption. The crystal structure of W₇Re₁₃B is cubic (β-Mn type). This compound exhibits a sharp superconducting transition at a temperature of T_c=7.2 K. The electronic structure of W₇Re₁₃B has been studied by X-ray photoelectron spectroscopy and the band structure has been calculated by the full-potential local-orbital minimum-basis method using the scalar-relativistic mode. The main contribution to the density of states at the Fermi level is from 5d electrons of W and Re. The W and Re bands are similar and substituting W by Re does not change the total density of states.

DOI: 10.12693/APhysPolA.109.597
PACS numbers: 71.20.Eh, 74.70.-b, 74.25.Ha, 74.25.Jb, 82.80.Pv