Superconducting Properties of Nb3 (Al, Ge) Prepared by Vacuum Vapor Deposition of the Elements
- 1 May 1972
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 43 (5), 2407-2413
- https://doi.org/10.1063/1.1661511
Abstract
Properties of films of the niobium‐aluminum‐germanium system prepared by simultaneous deposition of the individual constituents are presented. The optimum superconducting material obtained contains a large fraction of the desired A‐15 compound and has an as‐deposited critical temperature of over 17.8 K. Appropriate annealing increases Tc to above 19 K and probably close to values attained in bulk material. Current capacity is above 105 A/cm2 at 50 kOe. Limitations in sample properties have been caused by the substrate material, either Hastelloy B or niobium. Preliminary indications show that the use of tungsten‐coated Hastelloy B will avoid these limitations.Keywords
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