Abstract
Hysteresis of critcal currentsI c of superconducting bridges with In, Nb, and NbN has been studied in low perpendicular magnetic fields. Influences of bridge geometry, small field sweep, trapped flux, and bombardment of argon ions on the hysteresis were made clear. The experimental results suggest that the edge pinning and trapped flux in the bank of bridges are associated with the hysteresis. The peak value ofI c of NbN bridges, as well as granular Al and In bridges reported before, in decreasing fields agrees with the calculated pair-breaking current. The origin of the hysteresis is discussed.
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Aomine, T., Tanaka, E., Yamasaki, S. et al. Hysteresis of critical currents of superconducting bridges in low perpendicular magnetic fields. J Low Temp Phys 74, 263–275 (1989). https://doi.org/10.1007/BF00683375
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DOI: https://doi.org/10.1007/BF00683375