Mapping of magnetic force and field distribution of melt-textured Y-Ba-Cu-O

Melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-x/-bulk material has been prepared by a modified LPP-process. The samples have been characterized by optical microscopy, electron microscopy (SEM) and energy dispersive X-ray diffraction (EDX). An inductive method was used to determine critical current density J/sub c/ and transition temperature T/sub c/. The vertical levitation force and stiffness has been measured over the whole sample area using a permanent magnet and force sensors moved by a 3-dimensional positioning system. The measurements were performed in the field-cooled and zero-field-cooled state. In addition the magnetic field distribution of the flux frozen in by the superconductor was mapped with a Hall probe.<
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