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Spin-orbit torque-driven skyrmion dynamics revealed by time-resolved X-ray microscopy. | LitMetric

AI Article Synopsis

  • Magnetic skyrmions are unique spin structures that could enhance spintronic devices by being energy-efficient and able to handle a high density of information.
  • Researchers have been trying to fully understand how these skyrmions behave dynamically, but observing their rapid movements in real-time has been challenging until now.
  • This study successfully captures the ultrafast dynamics of a 100nm magnetic skyrmion using advanced imaging techniques, showing that these dynamics can be manipulated through adjustments in spin-orbit torques, which opens new avenues for innovative technology applications.

Article Abstract

Magnetic skyrmions are topologically protected spin textures with attractive properties suitable for high-density and low-power spintronic device applications. Much effort has been dedicated to understanding the dynamical behaviours of the magnetic skyrmions. However, experimental observation of the ultrafast dynamics of this chiral magnetic texture in real space, which is the hallmark of its quasiparticle nature, has so far remained elusive. Here, we report nanosecond-dynamics of a 100nm-diameter magnetic skyrmion during a current pulse application, using a time-resolved pump-probe soft X-ray imaging technique. We demonstrate that distinct dynamic excitation states of magnetic skyrmions, triggered by current-induced spin-orbit torques, can be reliably tuned by changing the magnitude of spin-orbit torques. Our findings show that the dynamics of magnetic skyrmions can be controlled by the spin-orbit torque on the nanosecond time scale, which points to exciting opportunities for ultrafast and novel skyrmionic applications in the future.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5458085PMC
http://dx.doi.org/10.1038/ncomms15573DOI Listing

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