Real Space Images of the Vortex Lattice Structure in a Type II Superconductor during Creep over a Barrier
F. Pardo, F. de la Cruz, P. L. Gammel, E. Bucher, C. Ogelsby, D. J. Bishop
DOI 10.1103/PhysRevLett.79.1369 · Physical Review Letters
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Abstract
We report on Bitter decoration studies of the magnetic flux line lattice in the type II superconductor NbSe2 during flux creep experiments over barriers, a surface step. We find that these steps can act as “vortex diodes.” By imaging the real space structures of the vortex lattices as they flow over these steps and measuring the change in vortex density, we are able to measure the energetic height of the barrier as well as the elastic correlation length of the vortices along their length. At low fields, we find that the vortices are correlated over distances of roughly 5μm.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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