The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.
Field-free deterministic ultrafast creation of magnetic skyrmions by spin–orbit torques
Open accessAbstract
Magnetic skyrmions are stabilized by a combination of external magnetic fields, stray field energies, higher-order exchange interactions and the Dzyaloshinskii-Moriya interaction (DMI). The last favours homochiral skyrmions, whose motion is driven by spin-orbit torques and is deterministic, which makes systems with a large DMI relevant for applications. Asymmetric multilayers of non-magnetic heavy metals with strong spin-orbit interactions and transition-metal ferromagnetic layers provide a large and tunable DMI. Also, the non-magnetic heavy metal layer can inject a vertical spin current with transverse spin polarization into the ferromagnetic layer via the spin Hall effect. This leads to torques that can be used to switch the magnetization completely in out-of-plane magnetized ferromagnetic elements, but the switching is deterministic only in the presence of a symmetry-breaking in-plane field. Although spin-orbit torques led to domain nucleation in continuous films and to stochastic nucleation of skyrmions in magnetic tracks, no practical means to create individual skyrmions controllably in an integrated device design at a selected position has been reported yet. Here we demonstrate that sub-nanosecond spin-orbit torque pulses can generate single skyrmions at custom-defined positions in a magnetic racetrack deterministically using the same current path as used for the shifting operation. The effect of the DMI implies that no external in-plane magnetic fields are needed for this aim. This implementation exploits a defect, such as a constriction in the magnetic track, that can serve as a skyrmion generator. The concept is applicable to any track geometry, including three-dimensional designs.
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Citations
Cites
Magnetic Domain-Wall Racetrack Memory
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Spin-Torque Switching with the Giant Spin Hall Effect of Tantalum
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Topological properties and dynamics of magnetic skyrmions
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The design and verification of MuMax3
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Nucleation, stability and current-induced motion of isolated magnetic skyrmions in nanostructures
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Self-citationWriting and Deleting Single Magnetic Skyrmions
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Blowing magnetic skyrmion bubbles
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Cited by
Tokura, Y., & Kanazawa, N. (2021) · Chemical Reviews · doi:10.1021/acs.chemrev.0c00297 · Cited by 726
Perspective: Magnetic skyrmions—Overview of recent progress in an active research field
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Fast current-driven domain walls and small skyrmions in a compensated ferrimagnet
Caretta, L., Mann, M., Büttner, F., Ueda, K., Pfau, B., Günther, C. M., Hessing, P., Churikova, A., Klose, C., Schneider, M., et al. (2018) · Nature Nanotechnology · doi:10.1038/s41565-018-0255-3 · Cited by 600
Self-citationSkyrmions in magnetic multilayers
Jiang, W., Chen, G., Liu, K., Zang, J., te Velthuis, S. G. E., & Hoffmann, A. (2017) · Physics Reports · doi:10.1016/j.physrep.2017.08.001 · Cited by 566
Room-temperature stabilization of antiferromagnetic skyrmions in synthetic antiferromagnets
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Metadata
- Authors
- Büttner, F., Lemesh, I., Schneider, M., Pfau, B., Günther, C. M., Hessing, P., Geilhufe, J., Caretta, L., Engel, D., Krüger, B., Viefhaus, J., Eisebitt, S., & Beach, G. S. D.
- Venue
- Nature Nanotechnology
- Published
- 2017-10-02
- Volume
- 12
- Issue
- 11
- Pages
- 1040-1044
- ISSN
- 1748-3387 (ISSN-L)
- 1748-3395
- OpenAlex
- W2761982224
- Cited by
- 304
- References
- 27
- FWCI
- 13.62
- Type
- journal article
- Language
- en
- Open access
- green
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- Büttner, F., Lemesh, I., Schneider, M., Pfau, B., Günther, C. M., Hessing, P., Geilhufe, J., Caretta, L., Engel, D., Krüger, B., Viefhaus, J., Eisebitt, S., & Beach, G. S. D. (2017). Field-free deterministic ultrafast creation of magnetic skyrmions by spin–orbit torques. Nature Nanotechnology. https://doi.org/10.1038/nnano.2017.178
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