EM9.1 Magnetic Levitation and the Meissner-Ochsenfeld Effect in Superconductors

The Meissner-Ochsenfeld effect is one of the most fundamental phenomena associated with superconductivity and describes the expulsion of magnetic fields from the interior of a superconductor due to the Higgs-Anderson mechanism. As a result, a superconductor is a perfect diamagnet. The Meissner-Ochsenfeld effect can be used to create magnetic levitation (as shown in this experimental demonstration), which, for example, is utilized in high speed trains. In this demonstration, we show that when a high-temperature superconductor is cooled down below its transition temperature (by using liquid nitrogen) and thus becomes superconducting, a magnet will levitate above it.

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