Current-voltage characteristics of high-temperature superconducting ceramics with the ?Peak effect? in the magnetic field dependence of the transport critical-current density

1995 ◽  
Vol 8 (2) ◽  
pp. 315-320 ◽  
Author(s):  
Adrian Crisan
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Critical Current Density ◽  
Magnetic Field Dependence ◽  
Peak Effect ◽  
Transport Critical Current Density ◽  
Current Voltage ◽  
Superconducting Ceramics ◽  
Current Voltage Characteristics ◽  
The Magnetic Field

SUPERCONDUCTIVITY ASSOCIATED WITH THE GRANULAR STRUCTURE IN Ba2YCu3O7−δ

1988 ◽  
Vol 02 (08) ◽  
pp. 1011-1015
Author(s):  
YONG ZHAO ◽  
QIRUI ZHANG ◽  
WEIYAN GUAN ◽  
JIANSHENG XIA ◽  
ZHENHUI HE ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transport Properties ◽  
Single Phase ◽  
Granular Structure ◽  
Current Voltage ◽  
Granular Superconductivity ◽  
Current Voltage Characteristics ◽  
The Magnetic Field ◽  
Nonmonotonic Behavior

The dependence of the resistance on the magnetic field and the current-voltage characteristics of the single phase Ba 2 YCu 3 O 7−δ have been measured. The nonmonotonic behavior and a hysteresis of R(H) and the current-voltage characteristics suggest that the granular superconductivity exist in this material, and it plays an important role in transport properties.

Effect of microstructure on the magnetic-field dependence of the local critical current density inYBa2Cu3O7−δsuperconductors

1992 ◽  
Vol 46 (17) ◽  
pp. 10986-10996 ◽  
Author(s):  
L. M. Fisher ◽  
V. S. Gorbachev ◽  
N. V. Il’in ◽  
N. M. Makarov ◽  
I. F. Voloshin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Critical Current Density ◽  
Critical Current ◽  
Field Dependence ◽  
Current Density ◽  
Magnetic Field Dependence ◽  
The Magnetic Field ◽  
Effect Of Microstructure

THE INFLUENCE OF JOSEPHSON JUNCTIONS ON THE DYNAMICAL CURRENT-VOLTAGE ANOMALIES IN CERAMIC SUPERCONDUCTORS

1994 ◽  
Vol 08 (23) ◽  
pp. 1447-1452
Author(s):  
J. SOSNOWSKI
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Transport Current ◽  
Ceramic Superconductors ◽  
Current Voltage ◽  
Josephson Junction Array ◽  
Model Predictions ◽  
Junction Array ◽  
Current Voltage Characteristics ◽  
The Magnetic Field

The influence of Josephson junction array on the dynamical current-voltage anomalies and magnetic properties of high temperature ceramic superconductors is analyzed. The influence of vortices penetrating the junction regions on the macroscopic current flowing through the sample is considered. In the case of zero transport current the existence of vortices modifies the magnetic field dependence of the screening currents and such magnetic properties as the shape of magnetization curves. In the case of transport current flow the existence of junctions may lead to a new critical state approach the consequences of which are anomalies of the dynamical current-voltage characteristics. Comparison of the theoretical model predictions with experimental data measured on high temperature ceramics of various composition is made.

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