Título
Cobalt double-ring and double-dot structures: Magnetic properties
Autor
FLORENTINO LOPEZ URIAS
José Jesús Torres Hereida
Emilio Muñoz Sandoval
Nivel de Acceso
Acceso Abierto
Identificador alterno
doi: https://doi.org/10.1016/j.physb.2015.12.026
Materias
Resumen o descripción
"The magnetization reversal mechanism of nanostructures of cobalt double-rings (D-rings) and double-dots (D-dots) is investigated in the framework of micromagnetic simulations. The arrays contain two identical coupled rings (wide and narrow) or dots with outer diameter of 200 nm and thicknesses ranging from 2–20 nm. Hysteresis loops, dipole–dipole and exchange energies are systematically calculated for the cases of the structures touching and the structures with a 50-nm inter-magnet separation; moreover, magnetization states along the hysteresis curve are analyzed. The results of both dot and ring D-magnets are compared with the corresponding individual magnets. Our results reveal that all D-ring (in contact and separated) arrays containing narrow rings exhibit non-null remanent magnetization; furthermore, higher coercive fields are promoted when the magnet thickness is increased. It is observed that the magnetization reversal is driven mainly by a clockwise rotation of onion-states, followed by states of frustrated vortices. Our results could help improve the understanding of the magnetic interactions in nanomagnet arrays."
Editor
Elsevier
Fecha de publicación
2016
Tipo de publicación
Artículo
Versión de la publicación
Versión aceptada
Recurso de información
Formato
application/pdf
Sugerencia de citación
F. López-Urías, J.J. Torres-Heredia, E. Muñoz-Sandoval, Cobalt double-ring and double-dot structures: Magnetic properties, Physica B: Condensed Matter, Volume 483, 2016, Pages 62-68.
Repositorio Orígen
Repositorio IPICYT
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