scholarly journals High critical current density of MgB2 bulk superconductor doped with Ti and sintered at ambient pressure

2001 ◽  
Vol 79 (8) ◽  
pp. 1154-1156 ◽  
Author(s):  
Y. Zhao ◽  
Y. Feng ◽  
C. H. Cheng ◽  
L. Zhou ◽  
Y. Wu ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Ambient Pressure ◽  
High Critical Current Density ◽  
Bulk Superconductor ◽  
Mgb2 Bulk

High Critical Current Density of a MgB2 Bulk Superconductor High-pressure Synthesized Directly from the Elements

2002 ◽  
Vol 17 (3) ◽  
pp. 525-527 ◽  
Author(s):  
C-Q. Jin ◽  
S-C. Li ◽  
J-L. Zhu ◽  
F-Y. Li ◽  
Z-X. Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Superconducting Transition ◽  
High Critical Current Density ◽  
Bulk Superconductor ◽  
High Pressure Sintering ◽  
Current Densities ◽  
Pressure Synthesis

We report the property studies of a MgB2 superconductor with high critical current density. The MgB2 superconductor was readily fabricated through a direct high-pressure synthesis of the respective elements. The obtained high-density MgB2 undergoes a sharp superconducting transition at 39 K. The bulk critical current density (Jc) of the sample was calculated on the basis of Bean's critical state model, and rather high critical current densities over a wide temperature range were obtained in comparison with the ambient prepared samples. The results highlight that high-pressure sintering would be a promising way to produce and search for this kind of intermetallic boride and the related superconductors.

High critical current density in iron-clad MgB2 tapes

2003 ◽  
Vol 82 (23) ◽  
pp. 4113-4115 ◽  
Author(s):  
H. Fang ◽  
S. Padmanabhan ◽  
Y. X. Zhou ◽  
K. Salama
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
High Critical Current Density

Analysis of Electromagnetic Properties of Bulk Superconductors

2021 ◽  
Vol 21 (9) ◽  
pp. 4941-4943
Author(s):  
Sang Heon Lee
Keyword(s):  
Critical Current Density ◽  
Single Crystal ◽  
Critical Current ◽  
Current Density ◽  
Magnetic Force ◽  
Electromagnetic Properties ◽  
Weak Links ◽  
Metallic Silver ◽  
Bulk Superconductor ◽  
Slow Cooling

In the present study, a YBa2Cu3O7−y bulk superconductor added with 5~10 wt% Ag was fabricated employing Sm123 as a seed to produce a superconductive single crystal. Metallic silver was added to the single crystal of YBa2Cu3O7−y to remove defects such as cracks and pores. Electromagnetic properties of the bulk superconductor at 77 K were analyzed based on relationships of magnetic levitation, trapped magnetic force, and critical current density. The critical current density of the superconductor at 77 K and 0 T was 3.53 × 104 A/cm2. Discontinuous points in the distribution of magnetic field lines were not observed, implying that these two specimens grew well as a single crystal without specific weak links. For the growth of a superconductive nano crystal employing slow cooling at temperature of formation of 123 phase, superconductive nano crystals were aligned in a-b direction, the direction of peak current flow. The peak value of the trapped magnetic force of the YBa2Cu3O7−y superconductor specimen was 3.23 kG. Using the FC method, peak forces of attraction and repulsion were 21.696 N and 70.168 N, respectively.

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