Journal Article

FZJ-2026-01825

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png All-optical stochastic switching of magnetisation textures in Fe3Sn2

Kovács, A. (Corresponding author)FZJ* ; Weber, J. T. (Corresponding author) ; Charilaou, M. (Corresponding author) ; Kong, D. ; Prodan, L. ; Tsurkan, V. ; Schröder, A. ; Kiselev, N. S.FZJ* ; Kézsmárki, I. ; Dunin-Borkowski, R. E.FZJ* ; Tavabi, A. H.FZJ* ; Schäfer, S.

2025
Springer Nature London

This record in other databases:    

Please use a persistent id in citations: doi:10.1038/s43246-025-00974-1  doi:10.34734/FZJ-2026-01825

Abstract: The all-optical control of magnetisation at room temperature broadens the scope of applications of spin degrees-of-freedom in data storage, spintronics, and quantum computing. Topological magnetic spin structures, such as skyrmions, are of particular interest due to their particle-like properties, small size and inherent stability. Controlling skyrmion states without strong magnetic fields or large current densities would create new possibilities for their application. In this work, we utilize femtosecond optical pulses to alter the helicity of the spin configuration in dipolar skyrmions formed in the kagome magnet Fe3Sn2 in the absence of an external magnetic field and at room temperature. In situ Lorentz transmission electron microscopy is used to visualise the light-induced stochastic switching process of chiral Néel caps, while the internal Bloch component of the dipolar skyrmions remains unchanged. In addition to this switching process, we observe the interconversion between type I skyrmionic and type II bubble configurations depending on the external magnetic field and illumination conditions. To corroborate the spin states and the light-induced magnetisation dynamics, micromagnetic modelling and simulations of the resulting electron phase shift maps are conducted to elucidate the spin rearrangement induced by individual femtosecond optical pulses.

Note: DFG Projekte bitte noch ergänzen: Project-ID: 405553726, TRR270 and 49254781, TRR360, Part of this work has been funded by the DFG through GRK 2905, project-ID 502572516.

---

Contributing Institute(s):

1. Physik Nanoskaliger Systeme (ER-C-1)

Research Program(s):

1. 5351 - Platform for Correlative, In Situ and Operando Characterization (POF4-535) (POF4-535)
2. 3D MAGiC - Three-dimensional magnetization textures: Discovery and control on the nanoscale (856538) (856538)
3. IMPRESS - INNOVATIVE APPROACHES FOR MARINE AND FRESHWATER BASED INGREDIENTS TO DEVELOP SUSTAINABLE FOODS AND VALUE CHAINS (101084437) (101084437)

---

Database coverage:
; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; DOAJ Seal ; Emerging Sources Citation Index ; Fees ; IF >= 5 ; JCR ; SCOPUS ; Web of Science Core Collection

---