Direct Imaging of Chiral Domain Walls and Néel-Type Skyrmionium in Ferrimagnetic Alloys
Seng B, Schoenke D, Yeste J, Reeve RM, Kerber N, Lacour D, Bello JL, Bergeard N, Kammerbauer F, Bhukta M, Ferte T, Boeglin C, Radu F, Abrudan R, Kachel T, Mangin S, Hehn M, Klaeui M (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 31
Article Number: 2102307
Journal Issue: 33
Abstract
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.
Involved external institutions
Johannes Gutenberg-Universität Mainz (JGU)
Germany (DE)
Université de Lorraine
France (FR)
Université de Strasbourg (UDS)
France (FR)
Helmholtz-Zentrum Berlin für Materialien und Energie (HZB)
Germany (DE)
Germany (DE)
Université de Lorraine
France (FR)
Université de Strasbourg (UDS)
France (FR)
Helmholtz-Zentrum Berlin für Materialien und Energie (HZB)
Germany (DE)
How to cite
APA:
Seng, B., Schoenke, D., Yeste, J., Reeve, R.M., Kerber, N., Lacour, D.,... Klaeui, M. (2021). Direct Imaging of Chiral Domain Walls and Néel-Type Skyrmionium in Ferrimagnetic Alloys. Advanced Functional Materials, 31(33). https://doi.org/10.1002/adfm.202102307
MLA:
Seng, Boris, et al. "Direct Imaging of Chiral Domain Walls and Néel-Type Skyrmionium in Ferrimagnetic Alloys." Advanced Functional Materials 31.33 (2021).
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