Critical current properties of multifilament V3Ga wire at temperatures above 4.2 Kelvin

Studies of the superconducting properties of V3Ga formed in composite wires by solid state reaction are presented. Multifilament wires were fabricated containing nineteen V-6.1 at.%Ga filaments or thirty V-8.0 at. %Ga filaments in a Cu-17.5 at .%Ga matrix. A study of Jcas a function of magnetic field and temperature on these wires is reported. At a temperature of 8.6 K, and in a magnetic field of 10 Tesla, a Jcof 4.2 × 10⁵amps/ cm²was measured for the thirty filament wire. This is significantly higher than the Jcof commercially available V3Ga tape Or Nb3Sn wire, These studies indicate that not only does our V3Ga wire exhibit high magnetic field properties Superior to those for commercially available wire at 4.2 K, but it also retains its superior Jcvalues at temperatures in excess of 11 K.