Accession Number : AD0282310

Title :   SUPERCONDUCTIVE EFFECTS IN THIN FILMS

Corporate Author : LITTLE (ARTHUR D) INC CAMBRIDGE MASS

Personal Author(s) : SHAPIRO,S.

Report Date : 15 AUG 1962

Pagination or Media Count : 1

Abstract : Despite new testing circuitry, it proved impossible to obtain the desired data showing the effect, if any, of crystalline anisotropy on the I-V tunneling characteristic. This resulted fromA COMBINATION OF HIGH TEMPERATURE DEPENDENCE OF TUNNELING RESISTANCE LEADING TO VERY HIGH VALUES AT LOW TEMPERATURES AND EFFECTS ATTRIBUTED TO PICKUP ACROSS THE HIGH RESISTANCE THAT RESULTED. Further work with aluminum appears unlikely of success and attention has been turned to the use of single crystal tin. The performance of superconducting tunneling assemblies as detectors at low radio frequencies has been examined both experimentally and analytically. A description is given of the circuit and the manner in which data were taken. Results are presented typical of the two types of behavior obtained, square law and linear. The effect of the presence of radio frequency on the I-V characteristic is analyzed in detail. The analysis is particularized to the case of superconducting tunneling by use of an equivalent circuit formalism. Expressions are obtained giving the rectified current and voltage in terms of the parameters describing the I-V curve of the device. (Author)

Descriptors :   *ELECTRONIC EQUIPMENT, *METAL CRYSTALS, *SUPERCONDUCTORS, *THIN FILMS (STORAGE DEVICES), ALUMINUM, ANALYSIS, ANISOTROPY, CRYSTALS, DETECTORS, DIODES, FEASIBILITY STUDIES, METAL FILMS, MICROWAVE FREQUENCY, OSCILLOSCOPES, RADIOFREQUENCY, RESISTANCE (ELECTRICAL), TEST EQUIPMENT, TESTS, TIN

Distribution Statement : APPROVED FOR PUBLIC RELEASE