Improvement of Superconducting Joint Properties for GdBaCuO Bulk Superconductors Joined with ErBaCuO Superconductor Using Local Melt-Growth Method.

The important factors in obtaining a high-quality superconducting joint were investigated for the superconducting joint of a GdBaCuO (GdBCO) bulk superconductor with sintered ErBaCuO (ErBCO) using the local melt-growth method. REBCO (RE: rare earth) bulk superconductors can be used as strong magnets by magnetizing them, but they require large bulk sizes for their application. Although the superconducting joint presents a viable solution, many possibilities for property improvement remain, such as property degradation, depending on the joining direction.