THE FABRICATION AND PROPERTIES OF SINGLE-DOMAIN YBCO DISK

Bulk melt textured YBCO materials in the shape of disks have been deve loped. It is found that the top seeded method is efficacious to fabric ate single domain material, which is required to achieve the best magn etic properties. Both trapped-field mapping and X-ray Phi-scan techniq ues have been used to evaluate the single domain nature of the YBCO di sks. A levitation force of 2N/g has been achieved for this kind of bul k.