Resonance in Magnetostatically Coupled Transverse Domain Walls
Galkiewicz, AT; O'Brien, L; Keatley, PS; et al.Cowburn, RP; Crowell, PA
Date: 24 July 2014
Journal
Physical Review B
Publisher
American Physical Society
Publisher DOI
Abstract
We have observed the eigenmodes of coupled transverse domain walls in a pair of ferromagnetic nanowires. Although the pair is coupled magnetostatically, its spectrum is determined by a combination of pinning by edge roughness and dipolar coupling of the two walls. Because the corresponding energy scales are comparable, the coupling can ...
We have observed the eigenmodes of coupled transverse domain walls in a pair of ferromagnetic nanowires. Although the pair is coupled magnetostatically, its spectrum is determined by a combination of pinning by edge roughness and dipolar coupling of the two walls. Because the corresponding energy scales are comparable, the coupling can be observed only at the smallest wire separations. A model of the coupled wall dynamics reproduces the experiment quantitatively, allowing for comparisons with the estimated pinning and domain wall coupling energies. The results have significant implications for the dynamics of devices based on coupled domain walls.
Physics and Astronomy
Faculty of Environment, Science and Economy
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