MAGNETIZATION CHARACTERISTICS OF YBACUO BULK MATERIAL FABRICATED BY THE SEEDING TECHNIQUE

YBaCuO (YBCO) bulk materials with large superconductive domains were f abricated using a small SmBa2Cu3Ox grain as the seed for growth. The c apacities of strong flux pinning and well grain linking in the materia l have been shown in the investigations on magnetization loop and ac s usceptibility. The strong flux pinning made it possible for the large YBCO bulk to capture a great deal of flux and keep the residual magnet ism stable. The residual held intensity H-rem was shown to have a maxi mum of 0.125 T after the 0.5 T NdFeB magnetizing field was moved away. We did not find much decline of H-rem in a short time. The magnetized YBCO bulk produced repulsive force upon another YBCO bulk, as the per manent magnet did. We measured and calculated the force between two YB CO bulks. The theoretical result was in agreement with the experimenta l one by and large.