Physics – Condensed Matter – Superconductivity
Scientific paper
2007-01-16
Phys. Rev. Lett. 98, 097002 (2007)
Physics
Condensed Matter
Superconductivity
15 pages, 4 figures, 1 table. accepted for publication in Physical Review Letter
Scientific paper
A comparative study of pure, SiC, and C doped MgB2 wires has revealed that the SiC doping allowed C substitution and MgB2 formation to take place simultaneously at low temperatures. C substitution enhances Hc2, while the defects, small grain size and nanoinclusions induced by C incorporation and low temperature processing are responsible for the improvement in Jc. The irreversibility field (Hirr) for the SiC doped sample reached the benchmarking value of 10 T at 20 K, exceeding that of NbTi at 4.2 K. This dual reaction model also enables us to predict desirable dopants for enhancing the performance properties of MgB2.
Babic Emil
Dhalle Marc
Dou Shi Xue
Flukiger Rene
Husnjak O.
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