High-Frequency Resistance of Superconductors

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MEASUREMENTS of the high-frequency resistance of superconducting tin, extending previous work1 at 1,200 Mc./s., have now been carried out at frequencies around 9,200 Mc./s. (wave-length 3.2 cm.). The experimental technique is in principle the same as at 1,200 Mc./s., with the twin-wire resonator replaced by a half-wave coaxial resonator. The variation of the resistivity, R, with temperature is shown in the accompanying graph, together with the results of the earlier measurements for comparison. For convenience, R is expressed in terms of the resistivity, Rn, of normal tin just above the transition temperature. The experimental points plotted are those taken with one of the five specimens actually measured; the points for the other specimens are in close agreement.

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  1. 1

    Pippard, A. B., Proc. Roy. Soc., A, 191, 370 (1947).

  2. 2

    See, for example, London, H., Proc. Roy. Soc., A, 176, 522 (1940).

  3. 3

    Pippard, A. B., Proc. Roy. Soc., A, 191, 385 (1947). Reuter, G. E. H., and Sondheimer, E. H., Nature, 161, 394 (1948).

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PIPPARD, A. High-Frequency Resistance of Superconductors. Nature 162, 68–69 (1948) doi:10.1038/162068a0

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