Abstract
We report on the superconducting properties of the cage compound Sc 5 Rh 6 Sn 18 with T c = 5 K determined by magnetic susceptibility, electrical resistivity, and specific heat measurements. Measurements in magnetic fields indicate type-II superconductivity with the upper critical field µ 0 H c2 (0) = 7.24 T. H c2 ( T ) shows a clear enhancement over the Werthamer–Helfand–Hohenberg prediction, suggesting a strong electron–phonon coupling. Specific heat data reveal that Sc 5 Rh 6 Sn 18 is indeed a strong-coupling BCS superconductor having an isotropic superconducting gap.
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