Directional vortex motion guided by artificially induced mesoscopic potentials

Details Directional vortex motion guided by artificially induced mesoscopic potentials Directional vortex motion guided by artificially induced mesoscopic potentials

2003-07-17

arxiv.org/abs/cond-mat/0307432v1

Published in Phys. Rev. B 68, 224504 (2003)

Physics

Condensed Matter

Superconductivity

PDF file includes figures

Scientific paper

10.1103/PhysRevB.68.224504

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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