Substitution effect on the superconductivity in W5-xTa xSiB2 with the T2 phase structure

M. Fukuma, K. Kawashima, J. Akimitsu

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1 Citation (Scopus)


We report here the magnetic susceptibility and electrical resistivity measurements of W5-xTaxSiB2. W5-xTaxSiB2 crystallizes in a tetragonal (the Mo5SiB2 (T2 phase) type) structure. We evaluated the effect of the partial substitution of Ta in W5SiB2. The superconductivity was observed below x 2 in W5-xTaxSiB2. As substituted Ta for W, the superconducting transition temperature (Tc) clearly enhanced from 5.8 K to 6.5 K. The largest volume fraction exhibits at x 0.2 sample. Thus, this work shows, for the first time, the superconductivity in W5-xTaxSiB2. Moreover, we determined that the dominant carrier sign of W5SiB2 are the hole from the thermoelectric power measurement and discussed about the enhancement of Tc of W5-xTaxSiB2 system.

Original languageEnglish
Article number012090
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2012
Externally publishedYes
EventInternational Conference on Strongly Correlated Electron Systems, SCES 2011 - Cambridge, United Kingdom
Duration: Aug 29 2011Sept 3 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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