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MA: Fachverband Magnetismus
MA 55: Skyrmions III
MA 55.5: Vortrag
Freitag, 13. März 2026, 10:30–10:45, HSZ/0004
Reorientation of skyrmion lattice with local magnetic field gradients — •Duc Tran1, Edoardo Mangini1, Elizabeth Jefremovas1, Dennis Meier2,3, Robert Frömter1, and Mathias Kläui1,2 — 1Institute of Physics, Johannes Gutenberg University Mainz, 55128 Mainz, Germany — 2Centre for Quantum Spintronics, NTNU, 7491 Trondheim, Norway — 3Faculty of Physics, University of Duisburg-Essen, 45057 Duisburg, Germany
We present a minimally invasive approach for nucleating and manipulating skyrmion lattices in soft CoFeB multilayers using single-pass MFM. By matching the scan-line spacing to the domain periodicity, we drive reversible transitions from stripe domains to isolated skyrmions and locally ordered lattices using the field gradient generated by the magnetic tip. Skyrmion positions are used to calculate the local orientational order parameter ψ6, allowing quantitative assessment of lattice order1. Repeated scanning leads to a systematic increase in ⟨|ψ6|⟩, revealing a progression from a disordered configuration toward a well-ordered hexagonal lattice. We show that the lattice orientation can be directly controlled by altering the scanning direction, as verified through both real-space analysis and fast Fourier transforms. This technique enables on-demand creation, rearrangement, and deletion of metastable skyrmions, offering unprecedented control over lattice symmetry, ordering, and orientation2.
1 R. Gruber et al., Nat. Nanotechnol. 20, 1405–1411 (2025).
2 D. Tran et al., Appl. Phys. Lett. (in press 2025), arXiv:2508.14771.
Keywords: skyrmion; magnetic force microscopy; lattice ordering