Title: Origin of reversed vortex ratchet motion
Authors: Gillijns, Werner ×
Silhanek, Alejandro
Moshchalkov, Victor
Reichhardt, C. J. Olson #
Issue Date: Dec-2007
Publisher: Amer physical soc
Series Title: Physical review letters vol:99 issue:24 pages:1-4
Article number: 247002
Abstract: We experimentally demonstrate that the origin of multiply reversed rectified vortex motion in an asymmetric pinning landscape not only is a consequence of the vortex-vortex interactions but also essentially depends on the ratio between the characteristic interaction distance and the period of the asymmetric pinning potential. We study four samples with different periods d of the asymmetric potential. For large d the dc voltage V-dc recorded under a ac excitation indicates that the average vortex drift is from bigger to smaller dots for all explored positive fields. As d is reduced, a series of sign reversals in the dc response are observed as a function of field. We show that the number of sign reversals increases as d decreases. These findings are in agreement with recent computer simulations and illustrate the relevance of the different characteristic lengths for the vortex rectification effects.
ISSN: 0031-9007
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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