Enlargement of bulk superconductors by the MUSLE technique
摘要
We have previously reported on the multi-seeded seamless bulk (MUSLE) technique, a new multi-seeding method for producing RE–Ba–Cu–O bulk superconductors. In order to study the superconducting prospects for MUSLE bulk, RE–Ba–Cu–O bulk superconductors of various sizes up to 100 mm in diameter were produced by the MUSLE technique. All trapped field distributions for the RE–Ba–Cu–O bulk superconductors had a single peak. For the 46 mm diameter MUSLE bulk, the Jc(B) across the grain boundary was comparable to that in the grain. We also estimated the macro-Jc flow in the bulk superconductors through the peak values of the trapped fields. The macro-Jc for the MUSLE bulk was larger than that for the single seeded bulk at sizes greater than 65 mm in diameter.