Vortex–lattice guided motion on isotropic and anisotropic artificial pinning landscapes
نویسندگان
چکیده
Vortex–lattice dynamics has been studied in superconducting Nb thin films with periodic arrays of magnetic pinning centers. Magnetotransport measurements have been used to study vortex–lattice velocity as a function of the in-plane direction of the driving force. This has been done for samples with arrays of decreasing anisotropy, from rectangular arrays (two-fold symmetry) to square arrays (four-fold symmetry). Strongly guided vortex motion along privileged directions has been found in the former, but not in the latter. The results are discussed in terms of channeling effects. q 2005 Elsevier Ltd. All rights reserved.
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تاریخ انتشار 2008