Abstract
The levitation forces between a single-domain YBCO bulk and several magnets of different sizes have been measured at 77 K to investigate the effect of the magnet size on the levitation force. It is found that the levitation force reaches a largest (peak) value when the size of the magnet approaches that of the superconductor when the other conditions are fixed. The absolute maximum attractive force (in the field-cooled state) increases with the increasing of the magnet size, and is saturated when the magnet size approaches that of the superconductor. The maximum attractive force in the field-cooled (FC) state is much higher than that of the maximum attractive force in the zero field-cooled (ZFC) state. The results indicate that the effects of magnetic field distribution on the levitation force have to be considered during the designing and manufacturing of superconducting devices.
| Original language | English |
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| Pages (from-to) | 789-792 |
| Number of pages | 4 |
| Journal | Superconductor Science and Technology |
| Volume | 16 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 2003 |
| Externally published | Yes |