Anomalous dependence of the critical current of 45° grain boundaries in YBa2Cu3O7−x on an applied magnetic field

1996 ◽  
Vol 101 (2) ◽  
pp. 175-179 ◽  
Author(s):  
J. Mannhart ◽  
B. Mayer ◽  
H. Hilgenkamp
Keyword(s):  
Magnetic Field ◽  
Grain Boundaries ◽  
Critical Current ◽  
Applied Magnetic Field ◽  
Anomalous Dependence

Composition Effects on the Critical Current of MOCVD-Processed Zr:GdYBCO Coated Conductors in an Applied Magnetic Field

2011 ◽  
Vol 21 (3) ◽  
pp. 3166-3170 ◽  
Author(s):  
Yimin Chen ◽  
Tuo Shi ◽  
Albert P. Guevara ◽  
Yangxin Zhang ◽  
Yao Yao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Critical Current ◽  
Applied Magnetic Field ◽  
Coated Conductors ◽  
Composition Effects

ENHANCEMENT OF TRANSPORT CRITICAL CURRENT DENSITY IN NANO Cr2O3 ADDED Ag-SHEATHED (Bi1.6Pb0.4)Sr2Ca2Cu3O10 SUPERCONDUCTOR TAPES

2010 ◽  
Vol 24 (28) ◽  
pp. 5625-5634
Author(s):  
W. KONG ◽  
R. ABD-SHUKOR
Keyword(s):  
Magnetic Field ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Applied Magnetic Field ◽  
Applied Field ◽  
Transport Critical Current Density ◽  
Force Density ◽  
Pinning Force ◽  
Ray Patterns

Ag -sheathed ( Bi 1.6 Pb 0.4) Sr 2 Ca 2 Cu 3 O 10( Bi –2223) high temperature superconductor tapes with 0.1 wt% nano Cr 2 O 3 were fabricated using the powder-in-tube method. The effects of intermediate rolling and sintering temperature on the transport critical current density (Jc) under self-field and applied magnetic field were studied. The X-ray patterns showed a dominant Bi –2223 phase (~80%). A decrease in Jc in applied magnetic field, parallel or perpendicular to the sample wide surface was observed for all tapes. Intermediate rolling improved the self-field Jc(T=77 K ) of the tapes by 25%. Both Jc versus applied field curves and normalized pinning force density Fp/Fp max versus applied field curves showed that the pinning strength was significantly enhanced with thermo-mechanical treatments. SEM micrographs showed improvements in the grain alignment of tapes with intermediate rolling. Enhancement in Jc was observed in the nano Cr 2 O 3 added tapes.

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