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

摘要

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.