Abstract
We report on a comprehensive study of the magnetic properties of the super-conductor vanadium. Starting from a high-purity sample (RRR=1900), we use magnetization measurements to evaluate the primary superconductive parameters of vanadium and their impurity dependence up to α⋍3.1. For the clean limit we findT c0 =5.47 K and κ 0 =0.78. From the impurity dependence of the transition temperature an rms gap anisotropy of ≈16% is obtained. Furthermore, for Ginzburg-Landau parameters ≲1.5 an attractive flux line interaction is found. The experiments on Hc2 anisotropy show results comparable to those for niobium, i.e., a slow decrease of the anisotropy coefficient a4 with increasing impurity parameter and a much faster decrease of the 1=6 component. A detailed analysis of these results awaits further progress of theory.
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