Ternary superconductor NbTiTa for high field superfluid magnets

The possibility exists to obtain a higher Hc2 upper critical field in the NbTi system which is normally limited by a spin-orbit coupling term. The introduction of scattering reduces this coupling. The spin-orbit scattering rate is proportional to Z4 and therefore leads logically to the introduction of a high atomic number element which is more or less similar with respect to all of the other properties, i.e., Tc. Previous studies have shown Tantalum to be an excellent choice. The present work represents an attempt to obtain a high current density, high field ternary magnet conductor (Jc (10T, 2K,ρeff = 10-12 ω-cm)) > 2000A/mm2. This goal was met, but the conductor was clearly not optimized