We have measured the in-phase component of the low-frequency ac impedance of the dc current-induced intermediate state in wires of pure and impure type I superconductors. We find that this dynamic resistance of the intermediate state is greater than the normal state resistance of the wire. The linear response theory for the dynamic resistance developed by Gauthier and Rochon provides a reasonable qualitative understanding of our experimental results.
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This work has been supported by the Chief of Research and Development, Department of National Defence, Canada through his contribution No. 3610-320.
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Wiederick, H.D., Mukherjee, B.K. & Baird, D.C. Dynamic resistance of the current-induced intermediate state in superconductors. J Low Temp Phys 41, 25–35 (1980). https://doi.org/10.1007/BF00117227
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DOI: https://doi.org/10.1007/BF00117227