Magnetic dipole induced guided vortex motion

Abstract

We present evidence of magnetically controlled guided vortex motion in a hybrid superconductor/ferromagnet nanosystem consisting of an Al film on top of a square array of permalloy square rings. When the rings are magnetized with an in-plane external field H, an array of point-like dipoles with moments antiparallel to H, is formed. The resulting magnetic template generates a strongly anisotropic pinning potential landscape for vortices in the superconducting layer. Transport measurements show that this anisotropy is able to confine the flux motion along the high symmetry axes of the square lattice of dipoles. This guided vortex motion can be either re-routed by 90 degrees by simply changing the dipole orientation or even strongly suppressed by inducing a flux-closure magnetic state with very low stray fields in the rings.

5 pages, 3 figures

References in corpus (10)

• Nanoengineered magnetic-field-induced superconductivity
• Guided vortex motion in superconductors with a square antidot lattice
• Reversible Vortex Ratchet Effects and Ordering in Superconductors with Simple Asymmetric Potential Arrays
• Guiding superconducting vortices by magnetic domain walls
• On the origin of the reversed vortex ratchet motion
• Generation of tunable Terahertz out-of-plane radiation using Josephson vortices in modulated layered superconductors
• Tunable pinning in superconducting films with magnetic micro-loops
• Role of twin boundaries on the vortex dynamics in YBa${}_2$Cu${}_3$O${}_7$
• Tunable Field Induced Superconductivity
• Tunable ratchet effects for vortices pinned by periodic magnetic dipole arrays

Cited by in corpus (5)

• Nucleation of superconductivity and vortex matter in superconductor - ferromagnet hybrids
• Evidence of a new low field cross-over in the vortex critical velocity of type-II superconducting thin films
• Self organized mode locking effect in superconductor / ferromagnet hybrids
• Direct visualization of magnetic vortex pinning in superconductors
• Different approaches to generate matching effects using arrays in contact with superconducting films