Enhancement of synchronized vortex lattice motion in hybrid magnetic/amorphous superconducting nanostructures

©American Institute of Physics. This work was supported by the Spanish Ministerio Ciencia e Innovacion, Grant Nos. NAN2004-09087 and FIS2005-07392, Consolider Grant Nos. CSD2007-00010 and FIS2008-06249 Grupo Consolidado, CAM Grant No. S-0505/ESP/0337, and Fondo Social Europeo and Junta de Comunidades de Castilla-La Mancha Grant No. PAI08-0067- 2673. A.A. wants to thank PCTI BP06-109.
Superconducting a-Mo_(3)Si and Nb films have been grown on arrays of Ni nanodots. We have studied the vortex lattice dynamics close to critical temperatures. Different vortex lattice configurations are obtained with the same array unit cell. These different vortex lattices occur at matching conditions between the vortex lattice and the array unit cell. The interplay between the random intrinsic pinning of the superconducting films and the periodic pinning of the array govern the vortex lattice configurations. Different vortex lattice configurations and enhancement of synchronized vortex lattice motion are obtained by increasing the periodic pinning strength and decreasing the random pinning strength.
Ministerio de Ciencia e Innovación (MICINN)
Comunidad de Madrid
Consolider
Fondo Social Europeo and Junta de Comunidades de Castilla-La Mancha
Depto. de Física de Materiales
Fac. de Ciencias Físicas
TRUE
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