The new non-equilibrium superconductor with a b c c structure has been found in rapidly quenched Zr-Si alloys. The silicon content in the b c c alloys was limited to the narrow range between 8 and 11 at%. The b c c alloys showed a superconducting transition whose temperature increased from 3.20 to 3.84 K with decreasing silicon content. The upper critical magnetic field and the critical current density for Zr92Si8 alloy were of the order of 3.58 × 106 Am-1 at 2.0 K and 3.3 × 10-2 Am-2 at 2.42 K in the absence of an applied field. The upper critical field gradient at the transition temperature and the electrical resistivity at 4.2 K were about - 1.82 × 10-1 Am-1 K-1 and about 150 μΩcm. The Ginzburg-Landau parameter κ and coherence length ξGL (0) were estimated to be about 65 and 6.3 nm, respectively, from these experimental values by using the Ginzburg-Landau-Abrikosov-Gorkov theory and hence it is concluded that the present b c c alloys are extremely "soft" type-II superconductors with a high degree of dirtiness.
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