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Torque on a spinning superconducting sphere inside a superconducting cylinder or spherical cap

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2 Author(s)
Holdeman, Louis B. ; Microelectronics Division, Comsat Laboratories, Clarksburg, Maryland 20871 ; Holdeman, Jonas T.

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A spinning superconducting sphere generates a magnetic field (the London field) while excluding external magnetic fields from its interior (the Meissner effect), so that a torque on the sphere results if there are magnetic or superconducting materials nearby. We calculate the torque on such a sphere inside a concentric, infinitely long superconducting cylinder. We also calculate the torque on such a sphere inside a concentric, spherical superconducting shell in which there is a single circular hole.

Published in:

Journal of Applied Physics  (Volume:57 ,  Issue: 3 )