Magnetization states in coupled Ni80Fe20 bi-ring nanostructures

Details Magnetization states in coupled Ni80Fe20 bi-ring nanostructures Magnetization states in coupled Ni80Fe20 bi-ring nanostructures

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12i3003r&link_type=abstract

New Journal of Physics, Volume 12, Issue 9, pp. 093003 (2010).

Physics

1

Scientific paper

The effects of magnetostatic and exchange coupling between two circular Ni80Fe20 rings on the magnetization reversal process and spin configuration are investigated using focused magneto-optic Kerr measurements and magnetic force microscopy measurements. When the two rings are contiguous and exchange coupled, the reversal occurs via a three-stage process leading to a significant reduction of the vortex-onion switching fields when compared to magnetostatically coupled ring pairs or isolated rings of the same lateral dimensions. For exchange-coupled rings, the chirality of the vortices in the two rings is correlated. The experimental results are compared to micromagnetic simulations.

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