Eur. Phys. J. AP
Volume 6, Number 3, June 1999
|Page(s)||263 - 266|
|Published online||15 June 1999|
DoMayn-orientation dependence and low anisotropy factor of levitation force in top-seeded melt-textured bulk YBCO
Forschungszentrum Karlsruhe GmbH, INFP, P.O. Box 3640, 76021
Corresponding author: axel.Kaiser2@de.bosch.com
Revised: 15 February 1999
Accepted: 15 February 1999
Published online: 15 June 1999
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.
PACS: 74.80.Bj – Granular, melt-textured, and amorphous superconductors; powders / 74.62.Bf – Effects of material synthesis, crystal structure, and chemical composition
© EDP Sciences, 1999
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