Geometry dependence of the magnetization reversal process in bridged dots

Based on Monte Carlo numerical simulations: results for the magnetization reversal process in thin circular Ni dots connected by a bridge are presented. The dependence of the process on both the width of the bridge and the orientation of the applied magnetic field has been investigated. It was found...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2017-06, Vol.432, p.304-308
Main Authors: Escobar, R.A., Lage, E., d’Albuquerque e Castro, J., Altbir, D., Ross, C.A.
Format: Article
Language:English
Subjects:
Bridged dots
Coercivity
Computer simulation
Magnetic fields
Magnetic vortex
Magnetism
Magnetization reversal
Monte Carlo simulation
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Summary:Based on Monte Carlo numerical simulations: results for the magnetization reversal process in thin circular Ni dots connected by a bridge are presented. The dependence of the process on both the width of the bridge and the orientation of the applied magnetic field has been investigated. It was found that when the applied magnetic field is set parallel to the bridge, the hysteresis curves are weakly dependent on the width of the bridge, being rather close to that of a single dot of the same diameter. On the other hand, when the magnetic field is applied perpendicularly to the bridge, a significant reduction in the coercivity of the system is obtained, even in the case of narrower bridges.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2017.01.087