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Superconductors in magnetic fields

  1. Dec 27, 2015 #1
    Does a superconductor experience any forces acting upon it when it is passed through a magnetic field?
  2. jcsd
  3. Dec 27, 2015 #2
    Yes, as evidenced by those videos of levitating superconductors.
  4. Dec 27, 2015 #3
    Adding to that, if type II superconductors would have some of the flux lines passing through the material:
    Let's assume there is current flowing within the conductor will it experience a Lorentz force(##F_L##)? Is it equal to(##IL \times B##)?
  5. Dec 28, 2015 #4


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    The magnetic field will be expelled from the superconductor. It can only propagate within a distance called the London penetration depth. This is the meissner effect. The applied field in the interior is cancelled by surface currents. In this sense, an sc is a perfect diamagnet, but the diamagnetism is different from ordinary materials.
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