Surface resistance of superconducting leads at 6.5 GHz |
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Authors: | S. Isagawa Y. Mizumachi |
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Affiliation: | National Laboratory for High Energy Physics, 1-1 Uehara, Talho-machi Tsukuba-Gun, Ibaraki 305, Japan. |
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Abstract: | The quality factor (Q value) of a cylindrical TEO11 mode lead cavity has been measured at 6.5 GHz in the temperature range 1.4–4.2 K. Lead was electroplated on a copper substrate. The temperature dependence of the surface resistance derived from the Q measurements has been compared with the semi-empirical formula of Pippard and the microscopic formula of Abrikosov, Gorkov and Khalatnikov (AGK). The plot fit is better with AGK. In this way, the normalized residual resistance (5.0 ± 0.2) × 10?4 and the energy gap Δ(0) = (4.30 ± 0.05)kTc was obtained. |
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Keywords: | superconductor surface resistance energy gap |
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