Formation a ribbon superconductor on niobium nitride matrix by ion plasma sputtering

In this studies; it has been found that production of delta-niobium nitride of stoichiometric composition is governed by the nitrogen content in a gas phase, the amount of sputtered niobium and the cluster energy state, determined, in turn, by the power supplied to a magnetron, the pressure within a synthesis band, the substrate disposition and the motion relatively a plasma flux and by other factors. The developed technology for production of a ribbon superconductor on a niobium nitride substrate involves operations of the preliminary and finishing treatment of a ribbon surface, subsequent deposition of coatings of titanium or titanium nitride and formation of the proper superconducting niobium nitride coating with/without subsequent thermal treatment. Deposition of the layers of titanium nitride, titanium and copper over the superconducting phase is possible as well as repetition of the combinations. Thus, the studies we performed show that the ion plasma technology for production of ribbon superconductors is quite fitted to industrial applications