Why do magnets float above a certain temprature?

Question

Why do magnets float above a certain temprature? I don't remember what the specific temperature was but it's around minus...... a lot, freezing cold.

Answer 1

Its an example of the Messier effect of a superconductor. In a superconducting material, such as mercury or tin, at extremely low temperatures, around 20 Kelvins or less (-200 C), electrical resistance disappears as well as the internal magnetic field of the material. i wont go into the exact effect but when a magnet is placed on top of a superconductor the Messier effect creates a magnetic cushion, making the magnet appear to levitate. Its really held there by a magnetic field, but since the superconductor will neither attract or repulse it since it has no magnetic field whatsoever, the magnet stays in position. Remember its not the magnet that has to be cooled down, its the superconducting material...

Answer 2

So your magnets float at a temp warmer than minus a lot? Like at room temp? Mine don't float, sorry about yours.