Publication: Experimental vortex ratchet effect in nanostructured superconductors
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2006
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Amer Inst Physics
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Abstract
Superconducting Nb thin films were grown on different arrays of triangle-shape metallic islands. The vortex lattice dynamics could be strongly modified by these asymmetric vortex traps. These asymmetric pinning potentials lead to a rectification effect on the vortex motion: Injecting an ac supercurrent on the sample yields a net dc vortex flow. This vortex ratchet ffect is adiabatic and reversible: The effect is frequency independent and the polarity of the dc voltage output could be tuned by the applied magnetic fields and the input ac currents.
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©Amer Inst Physics.
ISSN: 0094-243X
International Conference on Low Temperature Physics (LT24) (24. 2005. Orlando).
We want to thanks support from Spanish grants MAT2002-04543, NAN2004-09087, MAT2002-12385-E, CAM under grant 6R/MAT/0617/2002.Two of us, EMG and NON, want to thank Spanish Ministerio de Educacion y Ciencia for a Ramon y Cajal and Juan de la Cierva contracts respectively.