Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 35: Poster 2

MA 35.15: Poster

Donnerstag, 8. September 2022, 16:00–18:00, P4

Orientation and Shape of 180° Magnetoelastic Domain Walls in Antiferromagnets — •Bennet Karetta, Olena Gomonay, and Jairo Sinova — Institut für Physik, Johannes Gutenberg Universität Mainz, D-55099 Mainz, Germany

Antiferromagnets are potential candidates to be used in the future for active spintronics elements as they are faster and more stable than the ferromagnets in recent devices. However, without a net magnetization it is more difficult to manipulate their magnetic state. Recent studies suggested that the magnetoelastic coupling can be used to overcome this problem. Thus, it is essential to understand the interaction between the strains in the antiferromagnet and the Néel vector. In this study, we investigate the 180° antiferromagnetic domain wall and the influence on it from the strains. It is known that non-180° domain walls have preferred alignments in antiferromagnets since strains in the respective domains are incompatible for certain orientations. We show, that there is a similar anisotropy for the orientation of 180° domain walls, which now is induced by incompatibilities at the domain wall itself. We further investigate this anisotropy to determine how magnetoelasticity affects the shape of the closed 180° domain wall loop in the antiferromagnet. With this, we demonstrate that the shape of the loop significantly changes in comparison to a purely magnetic system and thus verify the strong influence of the magnetoelastic coupling on the equilibrium domain structure.