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Magnetic Levitation Force of Bulk YBaCuO Pieces as a Function of Texture
Author(s) -
Jung V.,
Brokmeier H.G.
Publication year - 2000
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/1521-4079(200003)35:3<321::aid-crat321>3.0.co;2-0
Subject(s) - levitation , superconductivity , materials science , texture (cosmology) , magnet , condensed matter physics , magnetic levitation , current (fluid) , full width at half maximum , volume (thermodynamics) , physics , optoelectronics , thermodynamics , quantum mechanics , artificial intelligence , computer science , image (mathematics)
Very well textured YBaCuO forms can be produced by means of seed crystals implanted in an YBaCuO melt. Narrow distributions of the directions (FWHM < 6°) of the c‐axes of the crystalline grains as well as the a‐ and b‐axes, respectively, are required for this purpose. Small angles between the c‐axes of adjacent grains, and small angles between the a‐ and b‐axes, respectively, of the neighbors, constitute but small obstacles in the path of the superconducting current induced. If the entire volume of the melt‐textured forms, in this case YBaCuO cylinders, is well textured, and if no random volume fractions remain, a maximum inducible superconducting current in the superconductor can be achieved and, thus, a maximum magnetic repellent force against the inducing permanent magnet, can be attained. This ensures maximum magnetic levitation force for a superconducting self‐stabilizing magnetic bearing.