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Dilute Al-Mn alloys for superconductor tunneling and other devices

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6 Author(s)
Ruggiero, S.T. ; Dept. of Phys., Univ. of Notre Dame, IN, USA ; Arnold, G.B. ; Williams, A. ; Clark, A.M.
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The authors present tunneling results for junctions comprising Mn doped Al films produced by sputter deposition, with Mn concentrations in the range of 0-5000 ppm. Our results for S'/I/S', S'/I/S, and N/I/S junctions demonstrate that Al-Mn alloys can serve both as superconductors with critical temperatures reduced from that of Al and as normal metals. The authors find Al-Mn in this doping range to be otherwise identical to pure Al in terms of its BCS-like tunnel characteristics (for superconductors) and its ability to produce high-quality tunnel barriers.

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Applied Superconductivity, IEEE Transactions on  (Volume:15 ,  Issue: 2 )