Title :
Magnetic field characterization of high Tc YBCO superconducting weak links
Author :
Hogenboom, D. ; Widom, A. ; Vittoria, C.
Author_Institution :
Northeastern Univ., Boston, MA, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
We report measurements of the voltage across a weak link as a function of applied magnetic field. This measurement provides a sensitive probe of the quality of a weak link, as exhibited by the uniformity of the critical current density across it. Much more structure was found in the current density across longer links, and hysteresis due to flux trapping is evident. Deviations from a uniform critical current density were observed even in very short (4 μ) links
Keywords :
Josephson effect; barium compounds; critical current density (superconductivity); flux pinning; high-temperature superconductors; yttrium compounds; 4 mum; YBCO superconducting weak links; YBa2Cu3O7; critical current density; flux trapping; high temperature superconductor; hysteresis; magnetic field characterization; Critical current; Critical current density; Current measurement; Density measurement; Grain boundaries; Magnetic field measurement; Magnetic fields; Substrates; Voltage measurement; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
