Comparison of amorphous melt-spun and vapor-quenched Zr-Rh alloys

Amorphous Zr-Rh alloys produced by melt spinning have a higher superconducting transition temperature Tc than materials generated by r.f. cosputtering techniques. However, the temperature dependence of the upper critical field Hc2(T is consistent with the GLAG theory for both materials. The Tc differences, as well as variations in the electronic density of states, can be partially understood in terms of slight differences in the average density, perhaps due to the inclusion of Ar gas during sputtering.