Spintronic Systems and Magnetic Skyrmion Dynamics

Spintronics exploits the electron’s spin degree of freedom alongside its charge, opening new paradigms for low-power, high-density data storage and logic devices. Central to this field are magnetic skyrmions—nanoscale, topologically protected whirlpools of magnetisation that can be manipulated with minimal currents or optical pulses. The stability of skyrmions originates from an interplay between exchange interactions, magnetocrystalline anisotropy and chiral exchange terms such as the Dzyaloshinskii–Moriya interaction. Recent advances have demonstrated room-temperature creation, deletion and rapid displacement of skyrmions in two-dimensional van der Waals ferromagnets and kagome lattices. These systems benefit from tunable crystal symmetry and defect engineering, which permit fine control over skyrmion size, chirality and phase transitions between Néel-type, Bloch-type and bubble-like textures. In parallel, ultrafast optical writing and current-driven modulation have been employed to achieve skyrmion nucleation and lattice formation on sub-picosecond to nanosecond timescales. This convergence of materials design, imaging techniques and dynamical control paves the way for skyrmion-based racetrack memories, neuromorphic elements and reconfigurable magnonic circuits, underscoring the global significance of magnetic skyrmion research.

Research from Nature Portfolio

Recent studies have reported the realisation of sub-100 nm Néel-type skyrmions at room temperature through the deliberate introduction of iron deficiency into non-stoichiometric van der Waals ferromagnets. This defect-driven breaking of inversion symmetry gives rise to a significant Dzyaloshinskii–Moriya interaction, while ultrafast optical Lorentz transmission electron microscopy has enabled the writing of individual skyrmions with femtosecond laser pulses. In layered Fe5GeTe2, topological spin structures persist up to ambient conditions, forming skyrmionic bubbles without preferred chirality in both metastable and equilibrium phases; combined experimental and theoretical analyses reveal that competing anisotropy and dipolar energies govern their stability. A complementary approach in a centrosymmetric kagome magnet demonstrates room-temperature switching between genuine skyrmions and non-topological type-II bubbles under an in-plane field, emphasising the role of magnetic anisotropy in stabilising distinct spin textures.

Spintronic Systems and Magnetic Skyrmion Dynamics publication trend

The graph below shows the total number of articles in spintronic systems and magnetic skyrmion dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Spintronics: Field of electronics that utilises electron spin and associated magnetic moment in addition to charge for information processing.

Magnetic skyrmion: A stable, swirling configuration of spins with non-trivial topology, often appearing as nanoscale quasiparticles in magnetic materials.

Dzyaloshinskii–Moriya interaction (DMI): An antisymmetric exchange interaction arising in non-centrosymmetric lattices or at interfaces, which favours chiral spin textures.

Van der Waals magnet: A layered magnetic material held together by van der Waals forces, allowing exfoliation to few-layer or monolayer thickness.

Néel-type skyrmion: A skyrmion in which the spin rotates within the radial plane, typically stabilised by interfacial or bulk DMI in certain crystal symmetries.

Bloch-type skyrmion: A skyrmion in which the spins rotate tangentially around the core, often found in bulk non-centrosymmetric helimagnets.

References

1. Room-temperature sub-100 nm Néel-type skyrmions in non-stoichiometric van der Waals ferromagnet Fe3-xGaTe2 with ultrafast laser writability. Nature Communications (2024).
2. Skyrmionic spin structures in layered Fe5GeTe2 up to room temperature. Communications Physics (2022).
3. Tunable room temperature magnetic skyrmions in centrosymmetric kagome magnet Mn4Ga2Sn. Communications Physics (2022).
4. Thickness-Tunable Zoology of Magnetic Spin Textures Observed in Fe5GeTe2. ACS Nano (2024).
5. Controllable Skyrmionic Phase Transition between Néel Skyrmions and Bloch Skyrmionic Bubbles in van der Waals Ferromagnet Fe3‐δGeTe2. Advanced Science (2023).
6. Magnetic and geometric control of spin textures in the itinerant kagome magnet Fe3Sn2. Physical Review Research (2021).