Micromagnetic simulations of 200-nm-diameter cobalt nanorings using a Reuleaux triangular geometry

Using micromagnetic simulations, we investigated the magnetic states and switching processes of Co nanorings with lateral dimensions of 200 nm. We propose a special geometry of nanorings that adopts different Reuleaux triangular shapes. Reuleaux's triangles (RT) combine both the equilateral tri...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2006-10, Vol.305 (1), p.133-140
Main Authors: Torres-Heredia, J.J., López-Urías, F., Muñoz-Sandoval, E.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Hysteresis
Magnetic nanorings
Magnetic properties and materials
Magnetic properties of nanostructures
Micromagnetic simulations
Physics
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Summary:Using micromagnetic simulations, we investigated the magnetic states and switching processes of Co nanorings with lateral dimensions of 200 nm. We propose a special geometry of nanorings that adopts different Reuleaux triangular shapes. Reuleaux's triangles (RT) combine both the equilateral triangle and circular geometries. We studied the magnetic spin configurations of individual nanorings by varying the thickness and geometry of the nanomagnets. Our results demonstrated that in most nanomagnets exhibiting a thickness of less than 4 nm, there exists an onion-type state, which precedes either a twisted, double twisted, or cardioid state, when studying the magnetization reversal process. The hysteresis loops and magnetic states found in these RTs are compared with circular nanorings.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2005.12.002