Superconductivity of Tin Isotopes

THE superconductivity of three samples of separated tin isotopes (identical with those mentioned in the preceding communication) has been investigated with two different methods. In addition to some experiments on the magnetic susceptibility, similar to those carried out by the American authors 1 and in Cambridge, detailed measurements of the dependence of the electrical resistance on temperature and magnetic field have been made. Thin rolled strips of the three isotopes and of natural tin, which had been annealed, were investigated simultaneously by the same method as employed previously 2 . The following results were obtained: