Collective pinning of imperfect vortex lattices by material line defects in extreme type-II superconductors

Details Collective pinning of imperfect vortex lattices by material line defects in extreme type-II superconductors Collective pinning of imperfect vortex lattices by material line defects in extreme type-II superconductors

2006-02-28

arxiv.org/abs/cond-mat/0602651v1

Phys. Rev. B 73, 094502 (2006)

Physics

Condensed Matter

Superconductivity

10 pages, 3 figures, 2 tables. To appear in Physical Review B

Scientific paper

10.1103/PhysRevB.73.094502

The critical current density shown by a superconductor at the extreme type-II limit is predicted to follow an inverse square-root power law with external magnetic field if the vortex lattice is weakly pinned by material line defects. It acquires an additional inverse dependence with thickness along the line direction once pinning of the interstitial vortex lines by material point defects is included. Moderate quantitative agreement with the critical current density shown by second-generation wires of high-temperature superconductors in kG magnetic fields is achieved at liquid-nitrogen temperature.

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