Superconducting Sphere and Finite-Size Permanent Magnet: Force, Torque, and Alignment Effect Calculation

作者：Diez Jimenez Efren^*; Valiente Blanco I; Perez Diaz Jose Luis

来源：Journal of Superconductivity and Novel Magnetism, 2013, 26(1): 71-75.

DOI：10.1007/s10948-012-1707-x

• Superconducting levitation
• Sphere
• Alignment effect

Using a local first-order interaction model, previously described, the force and torque between a superconducting sphere in the Meissner state and a finite-size permanent magnet are calculated. These findings are compared to results obtained by other models for the force based on the images method for a point magnetic dipole. It is demonstrated that the first-order calculation is a good approximation. %26lt;br%26gt;Moreover, the torque between a superconducting sphere and a magnet in different positions and angular orientations is calculated for the first time. We describe the alignment effect that tends to align a magnet tangentially to the superconducting sphere surface. In addition, it is shown that the finiteness of the magnet reduces the magnitude of the repulsive force.

• 出版日期2013-1