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Accession Number:
AD0417645
Title:
CRITICAL CURRENT AND FIELD IN NON-IDEAL SUPERCONDUCTORS,
Corporate Author:
AVCO EVERETT RESEARCH LAB EVERETT MASS
Report Date:
1963-07-01
Abstract:
The upper critical fields of the V-Ti system were measured at 4.2 degrees K and agree with Gorkov-Shapovals expression for the upper critical field of superconducting alloys. The critical current of samples of V with varying Ti content and also of Nb-25 Zr, all of rectangular cross-section .008 in. x .025 in., was measured as a function of the magnetic field H sub a applied parallel to the width of the strip. When the critical current I is plotted in units of the Silsbee current I sub c based on the thermo dynamic critical field H sub c, versus the applied magnetic field measured in units of the Gorkov-Shapoval upper critical field H sub 2, the experimental data for all the samples tested fall on a single curve. This critical curve is deduced from the free energy of a laminar mixed state model such that the applied current flows mainly within a penetration depth along the width of the strip end effects are neglected. Author
Descriptive Note:
Research rept.,
Pages:
0020
Contract Number:
AF04 694 33
File Size:
0.00MB
