Vanadium–gallium
Vanadium–gallium (V3Ga) is a superconducting alloy of vanadium and gallium. It is often used for the high field insert coils of superconducting electromagnets. Vanadium–gallium tape is used in the highest field magnets (magnetic fields of ). The structure of the superconducting A15 phase of  is similar to that of the more common . In conditions where the magnetic field is higher than  and the temperature is higher than ,  and  see use. The main property of  that makes it so useful is that it can be used in magnetic fields up to about , while  can only be used in fields up to about . The high field characteristics can be improved by doping with high-Z elements such as Nb, Ta, Sn, Pt and Pb. Physical Properties 

 has an A15 phase, which makes it extremely brittle. One must be extremely cautious not to over-bend the wire when handling it. Superconducting properties 
 Critical temperature (Tc): 
 Upper critical field (Hc2): over . Fabrication of superconductive wires or tapes 
 wires can be formed using solid-state precipitation. History

References 

Superconductors
Vanadium compounds
Gallium alloys