The Measurement and Modeling of the Levitation Force between Single-Grain YBCO Bulk Superconductors and Permanent Magnets

The levitation force between a single-grain yttrium barium copper oxide (YBCO) cylindrical bulk superconductor and a permanent magnet is investigated. The force measured both in zero field cooling and field cooling condition in the temperature range 20-80 K is reported. The dependence of peak levitation force and power dissipation on the temperature is analyzed, and the saturation of the peak forc...