Resonance in magnetostatically coupled transverse domain walls

A. T. Galkiewicz, L. O'Brien, P. S. Keatley, R. P. Cowburn, P. A. Crowell

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

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 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.

Original languageEnglish (US)
Article number024420
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number2
DOIs
StatePublished - Jul 24 2014

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