CRITICAL CURRENT AND FIELD IN NON-IDEAL SUPERCONDUCTORS,
Abstract
The upper critical fields of the V-Ti system were measured at 4.2 degrees K and agree with Gorkov-Shapoval's 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1963
- Accession Number
- AD0417645
Entities
People
- A.el Bindari
- M.m. Litvak