Abstract
Superconducting transition has been observed for the first time in amorphous Cr films prepared by co-sputtering of Cr and BN. Superconducting transition temperatures ( Tc) up to 1.14 K have been observed with an orbital contribution (i.e.(d H c2⊥ /d T) Tc ) as large as 49 kOe K -1. The electronic specific heat coefficient (γ) has been estimated to be about 1.6 times as large as that of amorphous Mo-BN (or Mo-metalloid) alloys. This finding, i.e. the low Tc with the large γ for amorphous Cr is inconsistent with data reported for amorphous alloys of 4 d and 5 d transition elements. This inconsistency implies a formation of local magnetic moments or spin fluctuation in the amorphous Cr film.
Published Version
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