Direct Imaging of Chiral Domain Walls and Néel‐Type Skyrmionium in Ferrimagnetic Alloys

Media type: E-Article
Title: Direct Imaging of Chiral Domain Walls and Néel‐Type Skyrmionium in Ferrimagnetic Alloys
Contributor: Seng, Boris; Schönke, Daniel; Yeste, Javier; Reeve, Robert M.; Kerber, Nico; Lacour, Daniel; Bello, Jean‐Loïs; Bergeard, Nicolas; Kammerbauer, Fabian; Bhukta, Mona; Ferté, Tom; Boeglin, Christine; Radu, Florin; Abrudan, Radu; Kachel, Torsten; Mangin, Stéphane; Hehn, Michel; Kläui, Mathias
Published: Wiley, 2021
Published in: Advanced Functional Materials, 31 (2021) 33
Language: English
DOI: 10.1002/adfm.202102307
ISSN: 1616-301X; 1616-3028
Keywords: Electrochemistry ; Condensed Matter Physics ; Biomaterials ; Electronic, Optical and Magnetic Materials
Origination:
Footnote:
Description: <jats:title>Abstract</jats:title><jats:p>The evolution of chiral spin structures is studied in ferrimagnetic 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‐handed Néel‐type domain wall (DW) spin textures over a large temperature range. This indicates the presence of a negative Dzyaloshinskii–Moriya interaction 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 more or less constant, which is explained by theoretical predictions. Beyond single skyrmions, it is identified by direct imaging a pure Néel‐type skyrmionium, which due to the expected vanishing skyrmion Hall angle, is a promising topological spin structure to enable applications by next generation of spintronic devices.</jats:p>

Search in field:

Recently searched for: