Video duration: 17 seconds
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A large black superconducting disk was cooled with liquid nitrogen. When the disk goes into the superconducting state it expels magnetic field. This is called perfect diamagnetism. If you place a magnet above the disk when it is superconducting then it will levitate. This is known as the Meissner effect.
Video duration: 440 seconds
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Here you can see a magnet flying over a hightemperature superconductor. It's a YBa2Cu3O HTSC which temperature is about 90 Kelvin.
(c) 2008 by Tobias Vogt
