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New Alloy Shows Promise as High‐Field Superconducting Magnet

JUN 01, 1970

DOI: 10.1063/1.3022163

Gloria B. Lubkin

An alloy of niobium, germanium and aluminum, ${Nb}_{0.8} ({Al}_{0.75} {Ge}_{0.25})_{0.2},$ has remained superconducting in a 410‐kG field at a temperature of 4.2 K. The alloy has the highest known transition temperature, 20.7 K. If the alloy can be made into a wire or tape that can maintain a high current density, it could be used to build a high‐field superconducting dc magnet (provided one could make a structure that would hold together under the enormous forces produced by the fields). The best material previously tested, ${Nb}_{3} Sn,$ has a critical field of about 220 kG at 4.2 K and has been used in commercial magnets for several years.

© 1970. American Institute of Physics

This Content Appeared In

Volume 23, Number 6

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