Dresden 2026 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 37: Non-Skyrmionic Magnetic Textures

MA 37.8: Vortrag

Mittwoch, 11. März 2026, 16:45–17:00, POT/0351

Extraordinary return point memory in ferrimagnetic materials — •Tamer Karaman¹, Kai Litzius¹, Aladin Ullrich¹, Riccardo Battistelli¹, Manas Patra^1,2, Raluca Boltje¹, Miela Gross², Steffen Wittrock², Krishnanjana Joy¹, Daniel Metternich², Sebastian Hoffman¹, Timo Schmidt¹, Daniel Perez³, Manuel Valvidares³, Sebastain Wintz², Manfred Albrecht¹, and Felix Büttner^1,2 — ¹University of Augsburg, Germany — ²Helmholtz-Zentrum Berlin, Germany — ³ALBA Synchrotron Light Source, Spain

Magnetic domains and domain walls are promising information carriers, widely explored for racetrack memory [1] and other mobility applications [2]. In this study, we demonstrate deterministic magnetic-domain nucleation in rare-earth transition-metal (RE-TM) ferrimagnetic systems. Remarkably, the as-grown domain configuration serves as an intrinsic template that reappears with 100% return-point memory after repeated out-of-plane magnetic-field cycling. Even more surprisingly, the full domain pattern can be toggle switched using extremely small in-plane fields near 0 mT, while the overall domain morphology remains unchanged. These findings point to new opportunities in cryptography and other technologies requiring deterministic pattern reproducibility, and they highlight the importance of further exploring properties of RE-TM ferrimagnets. References: 1.Parkin, S. et al. Nat. Nano. 10, 195-198 (2015) 2.Venkat, G. et al. J. Phys. Appl. Phys. 57, 063001 (2024).

Keywords: Rare-Earth Transition-Metal Ferrimagnets; Lorentz-TEM Microscopy; X-ray Imaging; Return Point Memory; Magnetic Domains and Domain Walls