Magnetic Moments and Eddy Currents in Spheres of Superconducting Tin

Abstract
Experiments have been carried out to measure the "frozen in" magnetic moments produced in superconducting spheres of tin, through demagnetization from fields sufficient to completely or partially destroy their superconductivity. Moments were determined by measuring periods of a torsion pendulum made from the spheres. Both solid tin spheres and spheres filled with non-superconducting material were examined.