Anisotropic vortex pinning in superconductors with a square array of rectangular submicron holes

Details Anisotropic vortex pinning in superconductors with a square array of rectangular submicron holes Anisotropic vortex pinning in superconductors with a square array of rectangular submicron holes

2003-02-11

arxiv.org/abs/cond-mat/0302199v1

Physical Review B 66, 214511 (2002)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.66.214511

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 IV-transition when the current is applied along the long side of the rectangular antidots.

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