Anisotropic vortex pinning in superconductors with a square array of rectangular submicron holes
L. Van Look, B. Y. Zhu, R. Jonckheere, B. R. Zhao, Z. X. Zhao, V. V. Moshchalkov
DOI 10.1103/PhysRevB.66.214511 · Physical Review B
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Abstract
We investigate vortex pinning in thin superconducting films with a square array of rectangular submicron holes (“antidots”). Two types of antidots are considered: antidots fully perforating the superconducting film and “blind antidots,” holes that perforate the film only up to a certain depth. In both systems, we observe a distinct anisotropy in the pinning properties, reflected in the critical current Ic, depending on the direction of the applied electrical current: parallel to the long side of the antidots or perpendicular to it. Although the mechanism responsible for the effect is very different in the two systems, they both show a higher critical current and a sharper I−V transition when the current is applied along the long side of the rectangular antidots.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.26 | Pressure not reported | onset |
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