Peak effect of critical current in a Bi-2212 superconducting single crystal

We report on the measurements of the remnant magnetization, and hence critical current, in a single crystal of YBa2Cu4O8. A peak in the temperature dependence of the critical current is observed when the external magnetic field is tilted away from the a–b planes. The observed behavior is attributed to a thermally activated instability-driven vortex-lattice splitting or vortex chain formation. The nature of the peak and the possibility of a thermally-activated dimensional crossover have been discussed.

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Microstructures and Enhancement of Critical Current Density in<tex>$rm YBa_2rm Cu_3rm O_7$</tex>Thin Films Grown by Pulsed Laser Deposition on Various Single Crystal Substrates Modified by Ag Nano-Dots

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2005.848731 ◽

2005 ◽

Vol 15 (2) ◽

pp. 3046-3049 ◽

Cited By ~ 10

Author(s):

A.H. Li ◽

M. Ionescu ◽

H.K. Liu ◽

T. Silver ◽

X.L. Wang ◽

...

Keyword(s):

Thin Films ◽

Critical Current Density ◽

Single Crystal ◽

Pulsed Laser Deposition ◽

Critical Current ◽

Current Density ◽

Pulsed Laser ◽

Laser Deposition

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Asymmetry of the critical current and peak effect in superconducting multilayers

Superconductor Science and Technology ◽

10.1088/0953-2048/23/6/065019 ◽

2010 ◽

Vol 23 (6) ◽

pp. 065019 ◽

Cited By ~ 1

Author(s):

S Yu Gavrilkin ◽

O M Ivanenko ◽

A N Lykov ◽

K V Mitsen ◽

A Yu Tsvetkov ◽

...

Keyword(s):

Critical Current ◽

Peak Effect

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Analysis of Electromagnetic Properties of Bulk Superconductors

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.19274 ◽

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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