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Ion-beam-deposited films for refractory-metal tunnel junctions

By: Prober, D.; Face, D.; Ruggiero, S.;

1983 / IEEE


This item was taken from the IEEE Periodical ' Ion-beam-deposited films for refractory-metal tunnel junctions ' We report on the application of a Kaufman ion source to the deposition of Nb and Ta thin films. We find that high quality Nb films (Tc= 9.1 K) can be produced by this technique under tolerant deposition conditions. In addition, substantial, systematic improvement in the I-V characteristics of Nb tunnel junctions has been realized by depositing, in situ, thin (e10� Ta layers on the Nb film surface.