School of Physics Lecture Demonstration Manual

Eh-8 The Meisner Effect

Published: Tuesday 14 March 2006 - Updated: Tuesday 29 March 2011

Aim

To demonstrate magnetic levitation due to the Meisner effect.

Apparatus

Diagrams

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Meisner Effect Pic

Videos

Meisner Effect

Description

The high temperature superconductor has a transition temperature of 88 degrees Kelvin. This temperature is considerably above that of Liquid Nitrogen (77degrees Kelvin). A superconductor has the property of preventing magnetic field penetration. This magnetic exclusion or Meissner effect comes about by the generation of an equal and opposite magnetic field in the superconductor. The induced field repels any outside field so a light magnet will float or levitate on this field.

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