As far as I know superconductors dispel magnetic fields, something called the meisner effect I think, and this is how superconductor levitation is achieved.But can they act as a magnetic shield between two powerful magnets or do the magnetic lines just find there way around the shield and attract at each other at the same force?
If you had a superconducting material in sheet form and it was sufficiently big, it would separate the fields of the two powerful magnets. Of course it would also feel the push of the magnetic fields. Since superconductors are, as near as we can measure, perfect electrical conductors, they produce perfect Eddy currents. The electrical field of the Eddy Current opposes the applied field and, since on energy is lost to resistance, the Eddy current field is equal to the applied field. The more powerful the applied field is, the larger the area of the superconducting shield would need to be. And. it is important to remember that superconductors are limited, if the critical current density is exceeded or the magnetic field strength is too high, the superconductor will quit superconducting and become a normal conductor.
