AWhat changed
Yu and colleagues used Lorentz transmission electron microscopy to image magnetic textures in a thin Fe₀.₅Co₀.₅Si film. Under a perpendicular magnetic field, they observed a hexagonal arrangement of swirling in-plane magnetization with roughly 90-nanometre spacing, and tracked its change with field and temperature. A two-dimensional spin-model Monte Carlo calculation supplied a comparison for the observed phase diagram.
Scientific scope
Yu and colleagues used Lorentz transmission electron microscopy to image magnetic textures in a thin Fe₀.₅Co₀.₅Si film. Under a perpendicular magnetic field, they observed a hexagonal arrangement of swirling in-plane magnetization with roughly 90-nanometre spacing, and tracked its change with field and temperature. A two-dimensional spin-model Monte Carlo calculation supplied a comparison for the observed phase diagram. The technique and transport-of-intensity analysis reconstruct in-plane magnetization; the out-of-plane spin direction was inferred by comparison with the model and field, not directly resolved by the images. The experiment concerns an electron-transparent thin specimen and finite field-temperature conditions; the experimental phase region exceeds that of the simplified simulation. It is distinct from earlier reciprocal-space neutron scattering and does not itself establish a skyrmion-based device, a universal zero-temperature phase or direct measurement of the complete three-dimensional spin field. The TIE reconstruction uses three focus planes and small-angle and weak-phase approximations; the reported Monte Carlo comparisons use finite periodic two-dimensional grids. Independent raw-image and simulation replay remain open.
Evidence
The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. The technique and transport-of-intensity analysis reconstruct in-plane magnetization; the out-of-plane spin direction was inferred by comparison with the model and field, not directly resolved by the images. The experiment concerns an electron-transparent thin specimen and finite field-temperature conditions; the experimental phase region exceeds that of the simplified simulation. It is distinct from earlier reciprocal-space neutron scattering and does not itself establish a skyrmion-based device, a universal zero-temperature phase or direct measurement of the complete three-dimensional spin field. The TIE reconstruction uses three focus planes and small-angle and weak-phase approximations; the reported Monte Carlo comparisons use finite periodic two-dimensional grids. Independent raw-image and simulation replay remain open.
Contributors
- The named authors in the research record · SCIENCE: These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
- Real-space observation of a two-dimensional skyrmion crystal
- Supplementary information: Real-space observation of a two-dimensional skyrmion crystal
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