Levitation Experiments Using the Meissner Effect
The phenomenon that a superconductor levitates above a magnet is called the Meissner effect. Because the superconducting state repels the magnetic field of magnets, superconductors can levitate above magnets. The Meissner effect experiments require superconductors, magnets and LN2. The magnetic field distribution of the magnet needs to be understood to conduct a superconducting levitation experiment. The distribution of magnetic field on the single magnet is similar to a water fountain with a maximum point in the centre. It is thus difficult to levitate the superconductor above a single magnet. Of course, if the size of the magnet is quite large, the shape of the magnetic field is almost flat, so superconductors can be levitated above it. However, due to the limitation of magnetization capacity, it is difficult to manufacture magnets of several tens of centimetres or more. For this reason, we made the magnetic levitation platforms by connecting several magnets. In this chapter, we demonstrated a variety of Meissner effect experiments using the magnetic platforms.
- 1.Meissner W, Ochsenfield R (1933) Ein neuer Effeckt bei Eintritt der Supraleitfähigkeit. Naturwissenschafen 21(44):787Google Scholar
- 4.What Causes Different Strengths in Magnets? https://sciencing.com/causes-different-strengths-magnets-5981925.html. Accessed 18 Dec 2018