Ideal two dimensional flux pinning induced by annealing in superconducting amorphous Zr75Rh25

Abstract By annealing amorphous Zr 75 Rh 25 prepared by melt spinning an ideal behaviour of the critical current was observed, in which the measured pinning forces are seen to follow the two dimensional Larkin-Orchivnikov theory. In the region where this theory is valid the changes in the pinning forces can be explained by the changes in the superconducting matrix and it can be assumed that the pinning centers do not change with the heat treatment.