What's Meisner effect??

Answer 1

The Meissner effect (or Meissner-Ochsenfeld effect) is the effect by which a weak magnetic field decays rapidly to zero in the interior of a superconductor. The distance to which the field is active is known as the London penetration depth. This active exclusion of magnetic fields is distinct from perfect diamagnetism. It is seen that the magnetic field will be zero inside the material in the superconducting state regardless of what it was before the material became superconducting. It was discovered by Walther Meißner and Robert Ochsenfeld in 1933. The Meissner effect is one of the defining features of superconductivity, and its discovery served to establish that the onset of superconductivity is a phase transition.

Answer 2

The last factor is even more incredible when one realizes that when a conductor undergoes the transition to the superconducting state, the superconductor expels a pre-existing field -- a phenomenon known as the Meisner Effect. (The superconductor’s magnetic field is also called a Meisner Field, and is thus distinguished from the nature of other magnetic fields.) External magnetic fields do penetrate the superconducting Meisner Field to some degree, the penetration depth being temperature dependent (minimum penetration at 0 oK, and infinite at Tc, defined as the Critical Temperature for the superconductor in question).

Answer 3

The Meissner effect is the effect by which a weak magnetic field decays rapidly to zero in the interior of a superconductor. This means that a magnetic field does not penetrate very far into the superconductor.

Answer 4

The effect of a magnet inducing currents in a superconductor which generate a magnetic field of the opposite 'polarity' causing the magnet to 'levitate' above the superconductor.


Doug

Answer 5

meisner effect is that when two super conductors are placed very close to each other then there is a sense of repulsion...this is the principle used in maglevs