We have studied the growth of disks of single-grain YBa2Cu3O7 (3BCO) with diameter to 5 cm using a top-seeded melt-texture technique. The quality of these YBCO disks was found to depend critically on the quality and size of the seed used, the temperature schedule of the growth adopted, the amount of Y2BaCuO5 and Pt added, and the size of the final disks processed. Samples of a diameter of 2.5 cm so-prepared have been observed to shield a magnetic field greater than 20 T at 4.2 K and to trap a field of 1.3 T at 77 K. However, no significant increase in the trapped field has been achieved by increasing the diameter of the disk to beyond ∼ 3 cm.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering