Nanoscale mechanics of antiferromagnetic domain walls

Hedrich, Natascha and Wagner, Kai and Pylypovskyi, Oleksandr V. and Shields, Brendan J. and Kosub, Tobias and Sheka, Denis D. and Makarov, Denys and Maletinsky, Patrick. (2021) Nanoscale mechanics of antiferromagnetic domain walls. Nature Physics, 17 (5). pp. 574-577.

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Official URL: https://edoc.unibas.ch/84679/

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Antiferromagnets can encode information in their ordered magnetic structure, providing the basis for future spintronic devices 1 , 2 , 3 . The control and understanding of antiferromagnetic domain walls, which are the interfaces between domains with differing order parameter orientations, are key ingredients for advancing antiferromagnetic spintronic technologies. However, studies of the intrinsic mechanics of individual antiferromagnetic domain walls are difficult because they require sufficiently pure materials and suitable experimental approaches to address domain walls on the nanoscale. Here we nucleate isolated 180° domain walls in a single crystal of Cr 2 O 3 , a prototypical collinear magnetoelectric antiferromagnet, and study their interaction with topographic features fabricated on the sample. We demonstrate domain wall manipulation through the resulting engineered energy landscape and show that the observed interaction is governed by the surface energy of the domain wall. We propose a topographically defined memory architecture based on antiferromagnetic domain walls. Our results advance the understanding of domain wall mechanics in antiferromagnets.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Georg H. Endress-Stiftungsprofessur für Experimentalphysik (Maletinsky)
UniBasel Contributors:Maletinsky, Patrick M.
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Nature Publishing Group
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:06 Oct 2021 07:25
Deposited On:06 Oct 2021 07:11

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