Vortex circulation patterns in planar microdisk arrays

Authors

• Sven Velten, Lawrence Berkeley National LaboratoryFollow
• Robert Streubel, Lawrence Berkeley National LaboratoryFollow
• Alan Farhan, Lawrence Berkeley National Laboratory
• Noah Kent, Lawrence Berkeley National Laboratory
• Mi Young Im, Lawrence Berkeley National Laboratory
• Andreas Scholl, Lawrence Berkeley National Laboratory
• Scott Dhuey, Lawrence Berkeley National Laboratory
• Carolin Behncke, Universität Hamburg
• Guido Meier, Max Planck Institute for the Structure and Dynamics of Matter
• Peter Fischer, Lawrence Berkeley National LaboratoryFollow

Document Type

Article

Date of this Version

6-26-2017

Citation

APPLIED PHYSICS LETTERS 110, 262406 (2017)

http://dx.doi.org/10.1063/1.4990990

Comments

Published by AIP Publishing. Used b y permission.

Abstract

We report a magnetic X-ray microscopy study of the pattern formation of circulation in arrays of magnetic vortices ordered in a hexagonal and a honeycomb lattice. In the honeycomb lattice, we observe at remanence an ordered phase of alternating circulations, whereas in the hexagonal lattice, small regions of alternating lines form. A variation in the edge-to-edge distance shows that the size of those regions scales with the magnetostatic interaction. Micromagnetic simulations reveal that the patterns result from the formation of flux closure states during the nucleation process.