Accession Number:

AD0631297

Title:

AN INVESTIGATION OF SUPERCONDUCTIVE FILMS OF TIN IN THE ELECTRIC INTERMEDIATE STATE AND SOME APPLICATIONS,

Descriptive Note:

Corporate Author:

CARNEGIE INST OF TECH PITTSBURGH PA DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

Report Date:

1963-04-01

Pagination or Media Count:

119.0

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

Subject Categories:

  • Electricity and Magnetism
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE