Dependence of the Critical Currents in Superconducting Films on Applied Magnetic Field and Temperature

1965 ◽  
Vol 140 (5A) ◽  
pp. A1568-A1580 ◽  
Author(s):  
J. A. Mydosh ◽  
Hans Meissner
Keyword(s):  
Magnetic Field ◽  
Applied Magnetic Field ◽  
Superconducting Films ◽  
Critical Currents

The Irreversibility of the Critical Currents of Polycrystalline Bulk EuBa2Cu3O7–x with Cycles in an Applied Magnetic Field

1990 ◽  
Vol 117 (2) ◽  
pp. K127-K131 ◽  
Author(s):  
Xin Jin ◽  
Xiaohui Wang ◽  
Yi Tang ◽  
Mu Lu ◽  
Yitong Zang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Applied Magnetic Field ◽  
Critical Currents

Nondestructive Analysis of Bi2212 Bulk Superconducting Ceramics in the C-Axis Direction

2016 ◽  
Vol 869 ◽  
pp. 29-34
Author(s):  
Antonio Renato Bigansolli ◽  
T.G. da Cruz ◽  
Durval Rodrigues Jr.
Keyword(s):  
Magnetic Field ◽  
Grain Size ◽  
Applied Magnetic Field ◽  
Structural Parameters ◽  
Processing Technique ◽  
Critical Currents ◽  
Weak Links ◽  
Critical Temperatures ◽  
Axis Direction ◽  
Average Grain Size

The use of superconductors of high critical temperatures in applied superconductivity leads to higher operation temperatures and economy of cryogenic fluids. High temperature superconductor materials exhibits limited transport properties due to grain boundary weak-links and anisotropy on the critical currents. The texturing development in these superconductors decreases in an efficient way the number of high-angle grain boundaries, increasing the values of the critical current densities. Several quantitative analysis methods have been developed to study the morphologic and topologic characteristics improving our understanding of structural parameters. In this work the grain size distribution characterization of Bi2Sr2CaCu2O8+δ Bi2212 superconductor bulk samples heat treated under the influence of an external applied magnetic field of 5T was carried out using a processing technique and analysis of images. The analyzed images were obtained by SEM in the c axis direction. All samples showed similar microstructures on both cases, but with the use of an external applied magnetic field during the heat treatments the average grain size decreased.

DOUBLE-MICROBRIDGE DC SQUIDS MADE FROM YBCO SUPERCONDUCTING FILMS

1990 ◽  
Vol 04 (13) ◽  
pp. 855-862 ◽  
Author(s):  
Y.F. CHEN ◽  
H.J. TAO ◽  
J.D. LI ◽  
Q.S. YANG ◽  
Y.Z. ZHANG ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Dependence ◽  
Applied Magnetic Field ◽  
Output Voltage ◽  
Magnetic Field Dependence ◽  
Superconducting Films ◽  
Flux Quantum ◽  
Voltage Versus ◽  
Patterning Technique ◽  
Ybco Superconducting Films

Double-microbridge DC SQUIDs have been fabricated from YBCO superconducting films by lithographically patterning technique. The voltage versus the applied magnetic field dependence of a DC SQUID has been obtained in the region of temperature from 4.2 K to 23 K, The largest output voltage of the devices used in our experiments is 3.4 uV /Φ0(Φ0 is h/2e the flux quantum). The smallest measured periodicity of the flux-voltage characteristics of the DC SQUID, 12.7 mG, is consistent with the designed value. In addition, some properties of the flux-voltage characteristics of the DC SQUIDs have been discussed.

Scaling of critical currents versus temperature in granular Y1Ba2Cu3O7−δ superconductors at zero applied magnetic field

1993 ◽  
Vol 215 (1-2) ◽  
pp. 105-112 ◽  
Author(s):  
A. Díaz ◽  
A. Pomar ◽  
G. Domarco ◽  
C. Torrón ◽  
J. Maza ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Applied Magnetic Field ◽  
Critical Currents
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