E.9.5 High T Superconductor

A small sample of a type I superconductor will demonstrate the Meissner Effect (levitating a magnet) when cooled in liquid nitrogen.

Another example of superconductivity can be demonstrated using a type II superconductor. A piece of superconducting material is cooled with liquid nitrogen on top of an array of magnets. When the material cools, it floats atop the magnetic array. If the array is turned upside down, the material goes from being levitated to suspended due to flux pinning which freezes the magnetic flux within the type II superconductor.