Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 44: Non-Skyrmionic Magnetic Textures
MA 44.4: Vortrag
Donnerstag, 21. März 2024, 16:00–16:15, EB 301
Local control over chiral textures with curvilinear helimagnets — •Luke Turnbull1, Max Birch2, Marisel Di Pietro Martinez1, Rikako Yamamoto1,3, Jeffrey Neethirajan1, Marina Raboni Ferreira1,4, Simone Finizio5, Sebastian Wintz6, Rachid Belkhou7, Claas Abert8, Dieter Suess8, and Claire Donnelly1 — 1MPI-CPfS, Dresden, Germany — 2RIKEN CEMS, Saitama, Japan — 3WPI-SKCM2, Hiroshima, Japan — 4LNLS, São Paulo, Brazil — 5PSI, Villigen, Switzerland — 6HZB, Berlin, Germany — 7SOLEIL, Saint Aubin, France — 8University of Vienna, Vienna, Austria
Precise control over the magnetic energy landscape is key for the stabilisation and control of topological magnetisation textures. Until now this has been commonly achieved with the bulk Dzyaloshinskii-Moriya interaction (DMI), a chiral interaction that arises due to broken crystalline inversion symmetry. But recently, there have also been proposals to make use of geometric symmetry breaking with curvature. Here we combine intrinsic and extrinsic interactions in patterned toroidal helimagnets, resulting in a locally varying DMI. Specifically, by patterning nanoscopic tori of single crystal helimagnets and imaging their magnetisation configuration using x-ray ptychographic imaging, we observe the presence of a radial curvature-induced helical texture, that we confirm with finite element micromagnetic simulations. Our work highlights the impact of curvature on chiral helimagnetism, offering opportunities to tailor chiral magnetic textures within curvilinear geometries.
Keywords: curvilinear magnetism; chiral helimagnets; x-ray ptychography