The effect of geometry on the trapped magnetic field in bulk superconductors

We have studied the effect of geometry on the trapped magnetic field in bulk Y–Ba–Cu–O superconductors by varying the thickness. The trapped field first increased with increasing thickness of the bulk superconductor, and then saturated when the thickness reached a certain value. We have also performed simulation studies based on the sand-pile model and the Biot–Savart law, which were in fairly good agreement with the experimental results.