Critical temperature and critical current density of superconducting V-Ga-Al alloys with A 15 structure

V-Ga-Al alloys containing 68–82 at.-% vanadium can be easily worked mechanically in the A2 phase and transformed into the superconducting A15 phase by subsequent heat treatment. The preparation, critical temperature and critical current density of the A15 phase are described. The critical current density, which at 5 Tesla is in the 10⁴ to 10⁵ A/cm² range, is compared with values of technically used superconductors. Ternary V-Ga-Al alloys are suitable for superconducting shielding devices for high fields.