Determination of critical current density in melt-processed HTS bulks from levitation force measurements

摘要

A simple approach to describe the levitation force measurements onmelt-processed HTS bulks was developed. A couple of methods to determine thecritical current density $J_c$ were introduced. The averaged $ab$-plane $J_c$values for the field parallel to this plane were determined. The first andsecond levitation force hysteresis loops calculated with these $J_c$ valuescoincide remarkably well with the experimental data.