Correlated Magnetic Vortex Chains in Mesoscopic Cobalt Dot Arrays
- 1 April 2002
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 88 (15) , 157203
- https://doi.org/10.1103/physrevlett.88.157203
Abstract
Nucleation and annihilation of vortex states have been studied in two-dimensional arrays of densely packed cobalt dots. A clear signature of dipolar interactions both between single-domain state dots and vortex state dots has been observed from the dependence of vortex nucleation and annihilation fields on interdot separation. A direct consequence of these interactions is the formation of vortex chains as well as dipole chains aligned along the direction of the external field. In addition, short range correlation of chiralities within vortex chains has been observed using magnetic force microscopy imaging and has been attributed to cross-talking between adjacent elements.Keywords
This publication has 12 references indexed in Scilit:
- Current-driven reversal in annular vertical giant magnetoresistive devicesApplied Physics Letters, 2001
- Size and thickness dependencies of magnetization reversal in Co dot arraysJournal of Applied Physics, 2001
- Flux Closure Structures in Cobalt RingsPhysical Review Letters, 2001
- Observation of a Bi-Domain State and Nucleation Free Switching in Mesoscopic Ring MagnetsPhysical Review Letters, 2001
- Lorentz microscopy of circular ferromagnetic permalloy nanodisksApplied Physics Letters, 2000
- Nucleation and annihilation of magnetic vortices in submicron-scale Co dotsJournal of Applied Physics, 2000
- Single-Domain Circular NanomagnetsPhysical Review Letters, 1999
- Magnetization Reversal in Arrays of Perpendicularly Magnetized Ultrathin Dots Coupled by Dipolar InteractionPhysical Review Letters, 1998
- Interactions between single domain particlesJournal of Applied Physics, 1994
- Magnetic force microscope study of the micromagnetics of submicrometer magnetic particlesJournal of Applied Physics, 1993