AN INVESTIGATION OF SUPERCONDUCTIVE FILMS OF TIN IN THE ELECTRIC INTERMEDIATE STATE AND SOME APPLICATIONS,
Abstract
The electric properties of vacuum deposited films of tin in the superconductive electric intermediate state (EIS) are investigated experimentally. Sample currents and magnetic fields have been employed over the frequency range from d.c. to 6,000 cycles per second. Films which have been cut in the shape of filamentary mazes have been used in this work. The over-all characteristics of these films are summarized by means of a phase diagram, which indicates the regions of applied magnetic field and temperature within which the films are in the superconductive state, the EIS, or in the normal state. Over a comparatively wide range of the experimentation, the voltage across the sample can be related to the temperature and the applied magnetic field by a simple exponential relationship. The properties of magneto-resistive amplifiers, thermometers, and gauss meters which are based on the operation of the films in the EIS, are examined theoretically and experimentally. The significance of the magnetic and thermal widths of the EIS is discussed in relation to the choice of operating ranges for the devices. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1963
- Accession Number
- AD0631297
Entities
People
- Thomas D. English Jr.
Organizations
- Carnegie Institute of Technology