2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/103138In this work we present measurements of the electrical conductivity and of the magnetization of La and of La-Pr and La-Lu dilute (up to 2 atomic percent) alloys, from which we determine, very in particular, the influence of dilute magnetic impurities on the upper critical magnetic field amplitude [and then on the superconducting coherence length amplitude and on the Ginzburg-Landau parameter].10 pages (including 6 figures)Superconductivitytext