A New Method for Fabrication of High Quality Single Domain GdBCO Ring Superconductor by RE+011 TSIG Method

In this paper, we provided a modified Gd+011 TSIG method to prepare single domain GdBCO bulk and ring superconductors. A single domain GdBCO bulk of 32 mm in diameter and a single domain GdBCO ring with inner and outer diameter of 13 and 32 mm have been fabricated. The physical properties of samples indicate that: (1) The levitation force are of 112.5 N(77 K, 0.5 T)and 111.9 N(77 K, 0.5 T)for the single domain GdBCO bulk and the single domain GdBCO ring respectively. (2) The trapped field are of 0.401 T (77 K) and 0.386 T (77 K) for the single domain GdBCO bulk and single domain GdBCO ring respectively. (4) The trapped magnetic flux of the single domain GdBCO ring is 1.72×10-4 Wb (77 K), which is higher than that of 1.55×10-4 Wb (77 K) for the single domain GdBCO bulk. These results provided a new way to prepare high quality single domain REBCO rings for practical application.