STABILITY AND OSCILLATION OF MTG HIGH-T-C SUPERCONDUCTORS IN INHOMOGENEOUS MAGNETIC-FIELD

The dependencies of the oscillation amplitude on the oscillation frequ ency of high-T-c superconducting (HTSC) melt-texture growth (MTG) ball -sample suspended or levitated in an inhomogeneous magnetic field have been investigated. The dependence of the oscillation amplitude versus the oscillation frequency has maxima. The rotation of the levitated o r suspended MTG ring-sample in the rotating magnetic field have been s tudied. The curve of the sample rotation frequency versus the magnet r otation frequency has maxima which correlate with maxima of the depend ence of the oscillation amplitude of the levitated HTSC MTG ball-sampl e on the frequency of the external magnetic field.