Improved critical current capability of V3Ga formed in a V-6Ga/Cu-15 Ga composite

Single filament V₃Ga composite wires were prepared by imbedding cores of pure V and V-6.1 at.% Ga in a Cu-15.4 at.% Ga matrix. The parabolic growth rate of V₃Ga was enhanced by alloying the core, and the superconducting critical current density was nearly doubled. At 4.2 K J_c exceeded 10⁵ A/cm² in transverse magnetic fields up to 140 kG.