Regensburg 2025 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 33: Non-Skyrmonic Magnetic Textures I
MA 33.12: Vortrag
Donnerstag, 20. März 2025, 12:30–12:45, H16
Three-dimensional topological spin textures in curved chiral magnets — •Luke Turnbull1,2, Max Birch3, Marisel Di Pietro Martínez1,2, Rikako Yamamoto1,2, Jeffrey Neethirajan1, Marina Raboni Ferreira1,4, Rachid Belkhou5, Simone Finizio6, Dieter Suess7, Geetha Balakrishnan8, Claas Abert7, Sebastian Wintz9, and Claire Donnelly3 — 1MPI CPfS, Dresden, Germany — 2WPI-SKCM2, Hiroshima, Japan — 3RIKEN CEMS, Saitama, Japan — 4Brazilian Synchrotron Light Laboratory, Sao Paulo, Brazil — 5Synchrotron SOLEIL, Saint Aubin, France — 6SLS, PSI, Villigen, Switzerland — 7University of Vienna, Vienna, Austria — 8Univeristy of Warwick, Coventry, UK — 9HZB, Berlin, Germany
Nanoscale topologically non-trivial magnetization configurations generate significant interest due to both their fundamental properties, and their potential applications in ultra-efficient computing devices. While such textures have been widely studied in two dimensions, three dimensional (3D) ordering can yield more complex configurations, resulting in richer topologies and dynamic behaviours. However, reliably nucleating such 3D textures has proven challenging. Here, we achieve the controlled formation of a double helix ordering through the 3D nanopatterning of chiral single crystal helimagnets into nano-tori. We demonstrate that the interplay of intrinsic exchange interactions of the single crystal, with the extrinsic emergent effects of the patterned geometry, leads to the stabilisation of surface-localized topologically non-trivial double helices. Our approach has the potential to be applied to a wide range of quantum material systems.
Keywords: curvilinear magnetism; chiral helimagnets