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Article Dans Une Revue Scientific Reports Année : 2015

Third type of domain wall in soft magnetic nanostrips

Olivier Fruchart
Stefania Pizzini
  • Fonction : Auteur
  • PersonId : 954051
Jan Vogel
Jean-Christophe Toussaint
  • Fonction : Auteur
  • PersonId : 921410
Nicolas Rougemaille
  • Fonction : Auteur
  • PersonId : 951387

Résumé

Magnetic domain walls (DWs) in nanostructures are low-dimensional objects that separate regions with uniform magnetisation. Since they can have di erent shapes and widths, DWs are an exciting playground for fundamental research, and became in the past years the subject of intense works, mainly focused on controlling, manipulating, and moving their internal magnetic con guration. In nanostrips with in-plane magnetisation, two DWs have been identi ed: in thin and narrow strips, transverse walls are energetically favored, while in thicker and wider strips vortex walls have lower energy. The associated phase diagram is now well established and often used to predict the low-energy magnetic con guration in a given magnetic nanostructure. However, besides the transverse and vortex walls, we nd numerically that another type of wall exists in permalloy nanos- trips. This third type of DWis characterised by a three-dimensional, ux closure micromagnetic structure with an unusual length and three internal degrees of freedom. Magnetic imaging on lithographically-patterned permalloy nanostrips con rms these predictions and shows that these DWs can be moved with an external magnetic eld of about 1 mT. An extended phase diagram describing the regions of stability of all known types of DWs in permalloy nanostrips is provided.
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Dates et versions

hal-01201754 , version 1 (18-09-2015)

Identifiants

Citer

V.-D. Nguyen, Olivier Fruchart, Stefania Pizzini, Jan Vogel, Jean-Christophe Toussaint, et al.. Third type of domain wall in soft magnetic nanostrips. Scientific Reports, 2015, 5, pp.12417. ⟨10.1038/srep12417⟩. ⟨hal-01201754⟩

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