4 papers
Vortex-glass transition in superconducting Nb/Cu superlattices
J. E. Villegas, J. L. Vicent
Nb/Cu superconducting superlattices have been fabricated by dc magnetron sputtering. This system shows a vortex glass transition with critical exponents similar to high temperature…
Experimental ratchet effect in superconducting films with periodic arrays of asymmetric potentials
J. E. Villegas, E. M. Gonzalez, M. P. Gonzalez +2
A vortex lattice ratchet effect has been investigated in Nb films grown on arrays of nanometric Ni triangles, which induce periodic asymmetric pinning potentials. The vortex lattic…
Directional vortex motion guided by artificially induced mesoscopic potentials
J. E. Villegas, E. M. Gonzalez, M. I. Montero +2
Rectangular pinning arrays of Ni dots define a potential landscape for vortex motion in Nb films. Magnetotransport experiments in which two in-plane orthogonal electrical currents…
Ferromagnetic/superconducting proximity effect in La0.7Ca0.3MnO3 / YBa2Cu3O7 superlattices
Z. Sefrioui, D Arias, V. Pena +6
We study the interplay between magnetism and superconductivity in high quality YBa2Cu3O7 (YBCO) / La0.7Ca0.3MnO3(LCMO)superlattices. We find evidence for the YBCO superconductivity…