Order in driven vortex lattices in superconducting Nb films with nanostructured pinning potentials

M. Vélez; D. Jaque; J. I. Martín; F. Guinea; J. L. Vicent

doi:10.1103/PhysRevB.65.094509

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Order in driven vortex lattices in superconducting Nb films with nanostructured pinning potentials

M. Vélez, D. Jaque, J. I. Martín, F. Guinea, J. L. Vicent

DOI 10.1103/PhysRevB.65.094509 · Physical Review B

T1

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Abstract

Driven vortex lattices have been studied in Nb films, in which natural random pinning coexists with artificial ordered arrays of defects (submicrometric Ni dots). Three different dynamic regimes are found: for low vortex velocities, there is a plastic flow regime in which random defects frustrate the effect of the ordered array; then, for vortex velocities in the range 1–100 m/s, there is a sudden increase in the interaction between the vortex lattice and the ordered dot array, associated to the onset of quasi-long-range order in the vortex lattice; finally, at larger velocities the ordered array-vortex lattice interaction is suppressed again, in agreement with the behavior found in numerical simulations.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown