Rotating Superconductors

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Abstract
Measurements are presented on the magnetic field generated within a superconductor when it is set into rotation—the so-called London moment. Solid rods and hollow cylinders have been investigated in a variety of materials in both single-crystal and polycrystalline specimens, and in both elemental and alloy superconductors. In the case of the hollow cylinders, wall thicknesses as thin as 27 Å have been employed. In all cases the results are in excellent agreement with the London formula.