Regensburg 2025 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 43: Skyrmions III / Non-Skyrmionic Magnetic Textures II
MA 43.12: Vortrag
Freitag, 21. März 2025, 12:30–12:45, H16
Extraordinary return point memory of Pt/Co/Dy ferrimagnetic multilayers — •Tamer Karaman1, Kai Litzius1, Sebastain Wintz2, Aladin Ullrich1, Daniel Metternich1,2, Steffen Wittrock2, Krishnanjana Joy1,2, Sebastian Hoffman1, Timo Schmidt1, Manfred Albrecht1, and Felix Büttner1,2 — 1Institute of Physics, University of Augsburg, 86159 Augsburg, Germany — 2Helmholtz-Zentrum Berlin, 14109 Berlin, Germany
Chiral magnetic spin textures are promising candidates for various spintronics applications [1]. These applications rely fundamentally on the controlled motion of spin textures under external stimuli. In this study, we report on the contrary and unique behaviour of Pt/Co/Dy rare-earth transition metal (RE-TM) ferrimagnetic multilayers, particularly their demonstration of full return-point memory. By studying the domain and domain wall response with field cycling using real-space imaging techniques, we observe deterministic behaviour where domains completely return to their original positions, even after exposure to high applied fields. Such observation is rarely documented in the literature and invites a variety of interpretations [2, 3]. This study emphasizes the significance of unexplored aspects of RE-TM ferrimagnets, advancing deeper exploration and broader utilization of these materials.
1. Fert, A. et al. Nat. Rev. Mater. 2, 17031 (2017). 2. Kappenberger, P. et al. Phys. Rev. Lett. 91, 267202 (2003). 3. Seu, K. A. et al. New J. Phys. 12, 035009 (2010).
Keywords: Ferrimagnetic multilayers; Return point memory; Magnetic peculiarity; Magnetic domains, domain walls; Magnetic imaging (MFM, LTEM, STXM)