Abstract
Using a ballistic method, we have measured the magnetization curve of the superconducting alloy Au2Bi ; for a specimen built up of separate small crystals we obtained the curve in Fig. 1. It will be seen that there is practically no 'tail' to the curve, and that the hysteresis is much less marked than for a typical superconducting alloy ; in fact, the magnetic behaviour approximates to that of an 'ideal' superconductor. Such hysteresis as there is, is probably due to very slight impurities in the specimen, rather than to the irregular shape, since a similar specimen made up of small irregular-lumps of very pure tin (an 'ideal' superconductor) showed much less hysteresis.
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SHOENBERG, D. Magnetic Properties of Superconductors. Nature 142, 874–875 (1938). https://doi.org/10.1038/142874d0
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DOI: https://doi.org/10.1038/142874d0
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