Directional vortex motion guided by artificially induced mesoscopic potentials

Abstract

Rectangular pinning arrays of Ni dots define a potential landscape for vortex motion in Nb films. Magnetotransport experiments in which two in-plane orthogonal electrical currents are injected simultaneously allow selecting the direction and magnitude of the Lorentz force on the vortex-lattice, thus providing the angular dependence of the vortex motion. The background dissipation depends on angle at low magnetic fields, which is progressively smeared out with increasing field. The periodic potential locks in the vortex motion along channeling directions. Because of this, vortex-lattice direction of motion is up to 85o away from the applied Lorentz force direction.

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References in corpus (5)

• Phase Locking, Devil's Staircases, Farey Trees, and Arnold Tongues in Driven Vortex Lattices with Periodic Pinning
• Complex Dynamical Flow Phases and Pinning in Superconductors with Rectangular Pinning Arrays
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• Anisotropic vortex pinning in superconductors with a square array of rectangular submicron holes
• Order in driven vortex lattices in superconducting Nb films with nanostructured pinning potentials

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