Flux annihilation in superconducting tubes

Clem, John R.; Fang, M. M.; Miller, S. L.; Ostenson, J. E.; Zhao, Z. X.; Finnemore, D. K.
December 1985
Applied Physics Letters;12/1/1985, Vol. 47 Issue 11, p1224
Academic Journal
A study of the motion of quantized vortices in cylindrical superconducting thin films was undertaken to determine the feasibility of constructing a magnetic shield in which the trapped transverse magnetic flux could be systematically swept out. The idea is to induce vortex-antivortex annihilation along one side of the cylinder under the influence of the Lorentz force using a transport current parallel to the axis of the cylinder. It is found that for a granular aluminum film approximately 1500 Ã… thick, there is a narrow temperature window near the critical temperature in which the vortices and antivortices can indeed be swept to one side and the internal field significantly reduced.


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