ArticleScience advances2018
Optical manipulation of magnetic vortices visualized in situ by Lorentz electron microscopy.
Article in Science advances, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 71 citations in OpenAlex.
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- Light-induced bimerons in a chiral magnet.Nature communications · 2026Article
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- Magneto-ionic vortices: voltage-reconfigurable swirling-spin analog-memory nanomagnets.Nature communications · 2025Article
- Stable antivortices in multiferroic ε-FeNature communications · 2025Article
- Room-temperature sub-100 nm Néel-type skyrmions in non-stoichiometric van der Waals ferromagnet FeNature communications · 2024Article
- TEM sample preparation of lithographically patterned permalloy nanostructures on silicon nitride membranes.Beilstein journal of nanotechnology · 2024Article
- Free-electron Ramsey-type interferometry for enhanced amplitude and phase imaging of nearfields.Science advances · 2023Article
- Field-induced magnetic phases in a qubit Penrose quasicrystal.Science advances · 2023Article
- Ultrafast high-harmonic nanoscopy of magnetization dynamics.Nature communications · 2021Article
- Properties and dynamics of meron topological spin textures in the two-dimensional magnet CrClNature communications · 2021Article
- Creation and annihilation of topological meron pairs in in-plane magnetized films.Nature communications · 2019Article
Corrections and comments
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Authors and funding
6 authors at 4 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Understanding the fundamental dynamics of topological vortex and antivortex naturally formed in microscale/nanoscale ferromagnetic building blocks under external perturbations is crucial to magnetic vortex-based information processing and spintronic devices. All previous studies have focused on magnetic vortex-core switching via external magnetic fields, spin-polarized currents, or spin waves, which have largely prohibited the investigation of novel spin configurations that could emerge from the ground states in ferromagnetic disks and their underlying dynamics. We report in situ visualization of femtosecond laser quenching-induced magnetic vortex changes in various symmetric ferromagnetic Permalloy disks by using Lorentz phase imaging of four-dimensional electron microscopy that enables in situ laser excitation. Besides the switching of magnetic vortex chirality and polarity, we observed with distinct occurrence frequencies a plenitude of complex magnetic structures that have never been observed by magnetic field- or current-assisted switching. These complex magnetic structures consist of a number of newly created topological magnetic defects (vortex and antivortex) strictly conserving the topological winding number, demonstrating the direct impact of topological invariants on magnetization dynamics in ferromagnetic disks. Their spin configurations show mirror or rotation symmetry due to the geometrical confinement of the disks. Combined micromagnetic simulations with the experimental observations reveal the underlying magnetization dynamics and formation mechanism of the optical quenching-induced complex magnetic structures. Their distinct occurrence rates are pertinent to their formation-growth energetics and pinning effects at the disk edge. On the basis of these findings, we propose a paradigm of optical quenching-assisted fast switching of vortex cores for the control of magnetic vortex-based information recording and spintronic devices.
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