SKM 2023 – scientific programme
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MA: Fachverband Magnetismus
MA 40: Poster Magnetism II
MA 40.3: Poster
Thursday, March 30, 2023, 14:00–16:00, P2/EG
Dynamics of bound domain walls in the 3D magnetic double helix — •Imelda Pamela Morales Fernandez1, Sandra Ruiz-Gómez1, Aurelio Hierro-Rodríguez2, Simone FInizio3, Sebastian Wintz4, Näemi Leo5, Markus König1, Claas Abert6, Dieter Süss6, Amalio Fernandez-Pacheco5, and Claire Donnelly1 — 1Max Planck Institute for Chemical Physics of Solids — 2University of Oviedo — 3Paul Scherrer Institute — 4Helmholtz Center Berlin — 5Institute of Nanoscience and Materials of Aragon — 6University of Vienna
Magnetic domain walls are stable magnetic textures that promise exciting opportunities for advances in technological applications in a wide range of fields. In contrast with their 2D counterparts, DWs in 3D nanosystems can exhibit more complex configurations, with prospects for exotic dynamic behavior. In this framework, double helix nanostructures combine geometrical effects of curvature and chirality with intrinsic exchange and magnetostatic coupling giving rise to a new state consisting of a highly coupled pair of domain walls (head-to-head and tail-to-tail) within the neighboring helices. The cobalt double helix fabricated by the FEBID technique is an ideal platform to experimentally investigate the static and dynamic properties of the coupled domain walls: it is a trustworthy platform to induce the vortex and antivortex textures in the magnetic field of the coupled domain wall state and on the other hand it is a promising system to achieve robust DW motion and synchronous dynamics with ultra-high DW mobilities overcoming the Walker breakdown.