Phase-Locking of Vortex Lattices Interacting with Periodic Pinning

Abstract

We examine Shapiro steps for vortex lattices interacting with periodic pinning arrays driven by AC and DC currents. The vortex flow occurs by the motion of the interstitial vortices through the periodic potential generated by the vortices that remain pinned at the pinning sites. Shapiro steps are observed for fields B_ϕ < B < 2.25B_ϕ with the most pronouced steps occuring for fields where the interstitial vortex lattice has a high degree of symmetry. The widths of the phase-locked current steps as a function of the magnitude of the AC driving are found to follow a Bessel function in agreement with theory.

5 pages 5 postscript figures

References in corpus (3)

• Dynamic Phases of Vortices in Superconductors with Periodic Pinning
• Commensurate and Incommensurate Vortex States in Superconductors with Periodic Pinning Arrays
• Shapiro steps in a superconducting film with an antidot lattice

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