Abstract
Well annealed In-films were implanted at low temperatures (T<7 K) with Mn+-ions and the superconducting transition temperatureT c of these alloys was determined in situ. The results can be described best by an Abrikosov-Gorkov-likeT c-depression with an initial slope of −50 K/at. %. From this we conclude that Mn has a long-lived magnetic moment in In. In addition, a comparison to quench condensedInMn-alloys shows that theT c-depression is not influenced by the much higher degree of disorder in these latter samples. This is contrasted by In-films, which were irradiated with high fluences of Ar+-ions before the Mn-implantation. Here a linearT c(C Mn) behavior was found with a slope of −39 K/at. %. In a complementary experimentInMn-alloys were irradiated with Ar+ after the Mn-implantation. The results indicate a vanishing pair breaking of the Mn-atoms. The observations of both irradiation experiments can be interpreted as changes of the magnetic moment due to specific local environments of the Mn-atoms produced by the Ar+-irradiation.
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Hofmann, A., Bauriedl, W. & Ziemann, P. T c-depression of superconducting diluteInMn-alloys produced by ion implantation. Z. Physik B - Condensed Matter 46, 117–122 (1982). https://doi.org/10.1007/BF01312716
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DOI: https://doi.org/10.1007/BF01312716