Meissner-effect definitions

mīs'nər
The effect whereby magnetic fields are excluded from a superconductor's interior if the superconductor is below a critical temperature, since introducing a magnetic field immediately creates electric currents in the superconductor that cancel the magnetic field. The Meissner effect is responsible for the diamagnetic properties of superconductors.
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(physics) The total expulsion of magnetic flux from the interior of a superconducting metal when it is cooled in a magnetic field below a critical temperature, near absolute zero, at which the transition to superconductivity takes place.
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Origin of meissner-effect

After Fritz Walther Meissner (1882–1974), German physicist who discovered it in collaboration with Robert Ochsenfeld (1901–1993), German physicist