Flux-closure domains in high aspect ratio electroless-deposited CoNiB nanotubes
Résumé
We report the fabrication and magnetic imaging of high-aspect ratio CoNiB nanotubes. With XMCD-PEEM we evidence multiple magnetic domains and domain walls in these nanotubes. Surprisingly, magnetization in the domains is orthoradial (azimuthal, vortex-like), a situation not anticipated by theory for long nanotubes. The material is therefore technologically appealing for a dense 3D magnetic device such as the racetrack memory (based on shifting magnetic walls), as flux-closure domains should efficiently prevent cross-talk related to internal dipolar fields. Further, we show tuning of a growth-induced anisotropy and thus of the magnetic state of the tube by annealing.
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2017-04-21 arXiv_submit1869848.pdf (5.31 Mo)
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2017-04-21 arXiv_submit1869848-supplementary.pdf (3.95 Mo)
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| Origine | Fichiers produits par l'(les) auteur(s) |
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| Origine | Fichiers produits par l'(les) auteur(s) |
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