YBaCuO pellet with magnet in liquid nitrogen on TV camera.

Meissner effect: Magnet levitates over cooled ceramic superconductor. NOTE: For other applications, see accompanying manual. A black superconductor ceramic disk is placed in a shallow styrofoam dish. A small but strong neodymium magnet is set on top of the disk. Liquid nitrogen is then poured into the dish. The disk is placed so that its top is flush with the surface of the liquid. When the disk is sufficiently cool, the magnet lifts up several millimeters above the superconductor surface due to the Meissner effect. Touching the magnet lightly with the plastic tongs will set the magnet spinning in place.