Flux expulsion and trapping in rotating discs of type II superconductors |
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Authors: | R Boyer MAR LeBlanc |
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Institution: | Physics Dept., University of Ottawa, Ottawa, Canada K1N 6N5 |
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Abstract: | The magnetic flux rotating in step with a type II superconducting disc is measured with orthogonal pick up coils for various previous magnetic histories vs H0 applied ⊥ to the axis of rotation. For some initial magnetic states, flux expulsion, independent of the rate of rotation, occurs during the initial rotation. A simple model where flux lines leave the specimen against the magnetic pressure in the active region accounts for the observations. |
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