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Authors: 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
Title: Direct imaging of chiral domain walls and Néel-type skyrmionium in ferrimagnetic alloys
Online publication date: 17-Sep-2021
Year of first publication: 2021
Language: english
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 Neel-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 Neel-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.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: CC BY-NC-ND
Information on rights of use:
Journal: Advanced functional materials
Pages or article number: 2102307
Publisher: Wiley-VCH
Publisher place: Weinheim
Issue date: 2021
ISSN: 1616-301X
Publisher URL:
Publisher DOI: 10.1002/adfm.202102307
Appears in collections:JGU-Publikationen

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