Direct imaging of chiral domain walls and Néel-type skyrmionium in ferrimagnetic alloys. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Advanced Functional Materials Année : 2021

Direct imaging of chiral domain walls and Néel-type skyrmionium in ferrimagnetic alloys.

Daniel Lacour
Stéphane Mangin
Michel Hehn

Résumé

The evolution of chiral spin structures is studied in ferrimagnet Ta/Ir/Fe/GdFeCo/Pt multilayers as a function of temperature using scanning electron microscopy with polarization analysis (SEMPA). The GdFeCo ferrimagnet exhibits pure right-hand Néel-type domain wall (DW) spin textures over a large temperature range. This indicates the presence of a negative Dzyaloshinskii-Moriya interaction (DMI) that can originate from both the top Fe/Pt and the Co/Pt interfaces. From measurements of the DW width, as well as complementary magnetic characterization, the exchange stiffness as a function of temperature is ascertained. The exchange stiffness is surprisingly mostly constant, which is explained by theoretical predictions. Beyond single skyrmions, we find by direct imaging a pure Néel-type skyrmionium, which due to the absence of a skyrmion Hall angle is a promising topological spin structure to enable high impact potential applications in the next generation of spintronic devices.
Fichier principal
Vignette du fichier
Seng_Klaui_2021_2102.13502.pdf (1.41 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03366846 , version 1 (05-10-2021)

Identifiants

Citer

Boris Seng, Daniel Schönke, Javier Yeste, Robert M Reeve, Nico Kerber, et al.. Direct imaging of chiral domain walls and Néel-type skyrmionium in ferrimagnetic alloys.. Advanced Functional Materials, 2021, ⟨10.1002/adfm.202102307⟩. ⟨hal-03366846⟩
44 Consultations
37 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More