Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 37: Skyrmions III
MA 37.13: Vortrag
Donnerstag, 21. März 2024, 12:45–13:00, EB 301
Antiferromagnetic (anti)merons and bimerons in synthetic antiferromagnets — •Mona Bhukta1, Takaaki Dohi1,2, Venkata Krishna Bharadwaj1, Ricardo Zarzuela1, Maria-Andromachi Syskaki1, Jairo Sinova1, Robert Frömter1, and Mona Bhukta1 — 1Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany — 2Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba, Sendai 980-8577, Japan
In recent years, topological defects stabilized by the Dzyaloshinskii-Moriya interaction, such as skyrmions, bimerons, etc, have caught increasing interest due to their small size, topologically enhanced stability and low threshold-current density required for their motion under the application of spin-orbit torques [1]. In this work, we investigate the conditions to stabilize antiferromagnetic meronic spin textures at room temperature to observe them experimentally in synthetic antiferromagnets [2]. By combining different magnetic imaging techniques such as magnetic force microscopy (MFM), scanning electron microscopy with polarization analysis (SEMPA), and X-ray magnetic circular dichroism photoemission electron microscopy (XMCD-PEEM) we image the three-dimensional Néel order parameter, revealing the of merons and antimerons in the Pt/CoFeB/Ir based SyAFM stacks [3]. [1] K. Litzius et al., Nat. Phys. 13, 170 (2017) [2] T. Dohi et al, Nat. Commun. 10, 5153 (2019) [3] M. Bhukta et al, arXiv:2303.14853 (2023)
Keywords: Merons; Bimerons; Synthetic antiferromagnet; SEMPA