Title :
Examination of current limiting mechanisms in monocore Bi2 Sr2Ca2Cu3Ox tape with high critical current density
Author :
Polyanskii, A. ; Feldmann, D.M. ; Patnaik, S. ; Jiang, J. ; Cai, X. ; Larbalestier, D. ; DeMoranville, K. ; Yu, D. ; Parrella, R.
Author_Institution :
Appl. Supercond. Center, Wisconsin Univ., Madison, WI, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
Magneto-optical imaging, electromagnetic measurements and SEM have been used for the characterization of a monocore BSCCO tape made by oxide powder-in-tube process which had a transport Jc (77 K, 0 T) of 37 kA/cm2. Our study evaluates the connectivity between superconducting grains and reconstructs the local current distribution at <10 μm scale. Some local regions are found to carry up to 180 kA/cm2 at 77 K, a new record for BSCCO wires
Keywords :
bismuth compounds; calcium compounds; critical current density (superconductivity); high-temperature superconductors; magneto-optical effects; strontium compounds; superconducting tapes; 77 K; Bi2Sr2Ca2Cu3O10 ; SEM; connectivity; current limiting mechanisms; electromagnetic measurements; high critical current density; high temperature superconductor; local current distribution; magneto-optical imaging; monocore Bi2Sr2Ca2Cu3Ox tape; oxide powder-in-tube process; superconducting grains; Bismuth compounds; Critical current density; Current distribution; Current limiters; Electromagnetic measurements; Image reconstruction; Magnetic field measurement; Magnetooptic effects; Strontium; Superconducting films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
