In this video, a small permanent magnet is suspended,
in mid air, above a superconducting disc. The animation
below shows how this effect is mediated by the magnetic
fields between the two objects: The magnet sits in a
potential "cushion" above the disc, as their
fields repel one another. If the surface area of the
disc is large compared to the magnet, the field will
be stable enough for the magnet to float.