Effect of paramagnetism and spin - orbit scattering on Hc2 of Zr - Nb alloys

Abstract

An expansion for the temperature dependence of H_c2(T) in the realm T/T_c ⪡ 1 is developed from the recent theories of Werthamer et al. and of Maki and is used to analyze our data for several Zr-Nb alloys. These theories do not consistently account for the temperature dependence of H_c2(T) in these alloys for both low temperatures and for T near T_c.