Publication: Vortex-lattice dynamics with channeled pinning potential landscapes
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2005-08
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American Physical Society
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Abstract
We have studied vortex-lattice dynamics as a function of driving force direction, in superconducting Nb films with periodic pinning arrays of magnetic dots. Square and rectangular symmetry arrays define channels that guide the vortex-lattice motion. We investigated the effect of the driving force direction on the commensurability between the vortex-lattice and dots array. We also studied the transverse depinning of the vortex-lattice as is moving longitudinally along channels. We found that transverse depinning forces are enhanced with respect to the static situation. The results are discussed in terms of the dynamical evolution of order in the vortex-lattice.
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©2005 The American Physical Society.
We want to thank support from Spanish CICYT Grants Nos. MAT02-04543 and MAT2002-12385E, CAM 6R/MAT/ 0617/2002, and Fundación Ramón Areces. Work at UCSD is supported by the US-NSF. E. M. González thanks the Ministerio de Educación y Ciencia for a Ramón y Cajal contract.