Significant Correlations Between Levitation-Suspension Forces and Critical Current Densities in Bulk YBCO/Ag Composite Superconductors Fabricated by Infiltration and Growth Processing Technique

We report on significant correlations between the levitation-suspension forces and critical current densities in bulk YBCO/Ag composite superconductors fabricated by infiltration and growth processing (IGP) technique. Based on our studies, we have found that there is a strong correlation between various parameters obtained from levitation and suspension force curves and the magnetic J (c)s calculated from M-H loops using the standard Bean's model-type approaches. Significantly, the levitation force gap and the critical current density of the bulk sample are in direct correlation. We also find that it is possible to qualitatively predict the J (c)s of samples from the levitation and suspension force curves by using this cost-effective measurement technique as a preliminary tool. These correlations provide a novel approach to rapid selection and characterization of bulk superconducting samples for their employment in practical applications.