Magnet Academy: Walther Meissner

Walther Meissner discovered while working with Robert Ochsenfeld that superconductors expel relatively weak magnetic fields from their interior and are strongly diamagnetic. This phenomenon, commonly known as the Meissner effect or the Meissner-Ochsenfeld effect, is related to the generation of screening currents along the surface of the superconductor that are able to cancel out the applied magnetic field.