Vanadium-gallium
Vanadium-gallium (V3Ga) a superconducting alloy of vanadium and gallium often used for the high field insert coils of superconducting electromagnets.
Vanadium-gallium tape is used in superconducting magnets (17.5 teslas or 175,000 gauss). The structure of the superconducting A15 phase of V3Ga is similar to that of the more common Nb3Sn and Nb3Ti.
The high field characteristics can be improved by doping with high-Z elements such as Nb, Ta, Sn, Pt and Pb
V3Ga wires can be formed using solid-state precipitation
V3Ga superconducting tape (10×0.14 mm cross section). A vanadium core is covered with 15 µm V3Ga layer, then 20 µm bronze (stabilizing layer) and 15 µm insulating layer. Critical current 180 A (19.2 tesla, 4.2 K), critical current density 20 kA/cm2
An example of a wire (V3Ga alloy) used in a superconducting magnet.
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