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DoMayn-orientation dependence and low anisotropy factorof levitationforce in top-seeded melt-textured bulk YBCO
Published online by Cambridge University Press: 15 June 1999
Abstract
Bulk Y1Ba2Cu3Oy was melt-textured without the use of seed crystals as well as by applying top-seeding with different seeds resulting in different orientations of the c-axis. Samples were examined by elastic neutron scattering and levitation force. The levitation force of the samples strongly depends on the orientation of the c-axis. The local superconducting parameters were found to be reduced with increasing distance from the seed. In order to study this influence, two cubes were prepared by top-seeding, but with seeds of Nd123 that had a parallel and perpendicular orientation of the c-axis of the Nd123-seed with respect to the contact area of the high-Tc superconductor. By this, different distances of the levitating surface, which is the surface that faces directly the magnet, from the seed were obtained. Results are presented and discussed.
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- © EDP Sciences, 1999