Magnetic Reversal by Mixed Modes in Two-Dimensional Hexagonal Array of Hollow Cobalt Nanospheres

Magnetization reversal in two-dimensional hexagonal arrays of cobalt hollow spheres occurs by mixed coherent and curling-vortex modes. Micromagnetic analysis was based on values of exchange, demagnetizing, and anisotropy energy. Arrays of 20 nm and 30 nm radius spheres were modeled, with sphere sepa...

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Bibliographic Details
Published in:IEEE magnetics letters 2018-01, Vol.9, p.1-4
Main Authors: Guerra Davila, Yuset, Pena Garcia, Ramon Raudel, Padron Hernandez, Eduardo
Format: Article
Language:English
Subjects:
Anisotropy
Arrays
Cobalt
cobalt nanospheres
Demagnetization
hollow spheres array
Magnetic domains
Magnetic fields
Magnetic hysteresis
Magnetization
Magnetization reversal
magnetization reversal modes
micromagnetic simulation
Micromagnetics
Nanomagnetics
Nanospheres
Perpendicular magnetic anisotropy
Spheres
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Summary:Magnetization reversal in two-dimensional hexagonal arrays of cobalt hollow spheres occurs by mixed coherent and curling-vortex modes. Micromagnetic analysis was based on values of exchange, demagnetizing, and anisotropy energy. Arrays of 20 nm and 30 nm radius spheres were modeled, with sphere separations of 0, 2, and 4 nm, which controlled the dipolar interactions. The results demonstrate that solutions for magnetization reversal of single hollow spheres cannot be applied to arrays of hollow spheres.
ISSN:1949-307X
1949-3088
DOI:10.1109/LMAG.2018.2866974