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Dilute Al-Mn Alloys for Superconductor Tunneling and Other Devices



Steve T. Ruggiero, G. B. Arnold, A Williams, Anna Clark, Nathan A. Tomlin, Joel Ullom


We present tunneling results for junctions comprising Mn doped Al films produced by sputter deposition, with Mn oncentrations in the range of 5000 ppm. Our results for SIS, IS, and NIS junctions demonstrate that Al-Mn alloys can serve as both superconductors with critical temperatures reduced from that of Al and as normal metals. We 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.
IEEE Transactions on Applied Superconductivity


Al-Mn, Resonant scattering, Superconducting aluminum alloys, Tunneling


Ruggiero, S. , Arnold, G. , Williams, A. , Clark, A. , Tomlin, N. and Ullom, J. (2005), Dilute Al-Mn Alloys for Superconductor Tunneling and Other Devices, IEEE Transactions on Applied Superconductivity, [online], (Accessed February 22, 2024)
Created June 12, 2005, Updated October 12, 2021