Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 7: Poster Magnetism I
MA 7.82: Poster
Monday, March 9, 2026, 09:30–12:30, P2
High resolution imaging of ultrathin PMA films for racetrack applications — •Anindit Das1, Sebastian Schneider1, Jae-Chun Jeon2, and Bernd Rellinghaus1 — 1DCN, cfaed, TU Dresden, Dresden, Germany — 2Max Planck Institute for Microstructure Physics, D-06120 Halle (Saale), Germany
The realization of domain wall (DW)-based racetrack memory requires Perpendicular Magnetic Anisotropy (PMA) thin films with finely tuned magnetic properties. This work combines direct imaging via Lorentz Transmission Electron Microscopy (LTEM) with micromagnetic simulations to establish design principles for such materials. Our simulations systematically vary key parameters—including saturation magnetization (Ms), uniaxial anisotropy (Ku), exchange stiffness (Aex), and the Dzyaloshinskii-Moriya interaction (DMI)—to understand their impact on DW structure and dynamics. We identify that an optimal balance is critical: a high Ku ensures thermal stability, while a moderate Ms and tailored DMI are essential for efficient, fast DW motion. However, significant challenges arise from conflicting requirements; for instance, a high Aex is necessary for robust DWs but can also increase the depinning field, and excessive DMI can compromise DW integrity. This study provides a crucial map of the material parameter space, highlighting the trade-offs between stability, speed, and fabricability to guide the development of viable PMA films for racetrack memory.
Financial support by the DFG through TRR 404, project no.
528378584, is gratefully acknowledged.
Keywords: Racetrack Memory; Perpendicular Magnetic Anisotropy (PMA)