Superconductivity and phase compositions in annealed amorphous Nb-Si alloys under high pressure

We report the results of amorphous Nb 81Si 19 and Nb 77Si 23 alloys annealed at high pressure but at a pressure lower than that used to synthesize single-phase A15 Nb 3Si. The lower pressure gives rise to the decomposition of the alloys into a multi-phase state consisting of A15 Nb 3Si, Γ-Nb 5Si 3,...

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Bibliographic Details
Published in:Solid state communications 1986-05, Vol.58 (5), p.285-288
Main Authors: Wang, W.K., Wang, Y.J., He, S.A., Huang, J.H., Boyer, J.D., Huang, C.Y., Iwasaki, H.
Format: Article
Language:English
Subjects:
Analysing. Testing. Standards
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals, semimetals and alloys
Metals. Metallurgy
Occurrence, potential candidates
Physics
Specific materials
Superconductivity
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Summary:We report the results of amorphous Nb 81Si 19 and Nb 77Si 23 alloys annealed at high pressure but at a pressure lower than that used to synthesize single-phase A15 Nb 3Si. The lower pressure gives rise to the decomposition of the alloys into a multi-phase state consisting of A15 Nb 3Si, Γ-Nb 5Si 3, L1 2-type Nb 3Si and Nb. The lattice constants are smaller and T c higher than those obtained for the single-phase samples. We predict the T c of stoichiometric A15 Nb 3Si to be 25 K.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(86)90085-2