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Directional vortex motion guided by artificially induced mesoscopic potentials

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Villegas, J. E. and González Herrera, Elvira María and Montero,, M. I. and Schuller, Ivan K. and Vicent López, José Luis (2003) Directional vortex motion guided by artificially induced mesoscopic potentials. Physical review B, 68 (22). ISSN 1098-0121

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Official URL: http://dx.doi.org/10.1103/PhysRevB.68.224504


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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 one to select 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 the 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, the vortex-lattice direction of motion is up to 85degrees away from the applied Lorentz force direction.


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©2003 The American Physical Society.
We acknowledge Grant No. MAT02-04543 from Spanish CICYT, Fundación Ramón Areces and New Del Amo Program. Work at UCSD was supported by the U.S. DOE.ESF Vortex program. One of us (E.M.G.) thanks Spanish Ministerio Ciencia Tecnologia for a Ramon y Cajal contract. We thank Professor J. Santamaría for useful conversations and a critical reading of the paper, and thank A. Silhanek and J. Schuller for helpful conversations.

Uncontrolled Keywords:Superconducting films; Magnetic dots; Regular array; Nb films; Lattice
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:43871
Deposited On:19 Jul 2017 15:27
Last Modified:19 Jul 2017 15:27

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