Abstract
The magnetic properties of a superconductive lead sphere have been studied through the measurement of the voltage induced between the axis and the periphery of the sphere rotated as a Faraday disk at constant speed in an axial magnetic field. Measurements were made in the range 0-10,800 r.p.m. The data are consistent in all details, including critical field and the amount of frozen flux, with the properties of the stationary sphere. In the course of this work, it was found that films of colloidal graphite serve as useful resistance thermometers in the liquid helium range.
- Received 23 November 1949
DOI:https://doi.org/10.1103/PhysRev.78.260
©1950 American Physical Society
