Anisotropic pinning enhancement in Nb films with arrays of submicrometric Ni lines



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Jaque, D. and González Herrera, Elvira María and Martín, J. I. and Anguita,, J. V. and Vicent López, José Luis (2002) Anisotropic pinning enhancement in Nb films with arrays of submicrometric Ni lines. Applied physics letters, 81 (15). pp. 2851-2853. ISSN 0003-6951

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Arrays of submicrometric Ni lines have been fabricated in superconducting Nb films by electron beam lithography. In the mixed state, these arrays induce strong anisotropy in the dissipation behavior. The dissipation is reduced several orders of magnitude, in the whole applied magnetic field range, when the vortex motion is perpendicular to the Ni lines (applied current parallel to them) in comparison with dissipation of vortices moving parallel to the lines. In addition, for the samples studied in this work, a change in the slope of the rho(B) curves is observed when the vortices move perpendicular to the lines and the vortex lattice parameter matches the width of the Ni lines.

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©2002 American Institute of Physics.
The authors want to thank Spanish CICYT MAT2002- 04543 and ESF Vortex program. D.J. and E.M.G. thank Ministerio de Ciencia y Tecnología (Spain) for Ramón y Cajal Contracts.

Uncontrolled Keywords:Superconducting films; Regular array; Magnetic dots; Lattices
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:43879
Deposited On:20 Jul 2017 17:02
Last Modified:20 Jul 2017 17:02

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