4.8 Article

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

期刊

NATURE COMMUNICATIONS
卷 8, 期 -, 页码 -

出版社

NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms15573

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资金

  1. KIST Institutional Program
  2. National Research Council of Science & Technology (NST) by the Korea government (MSIP) [CAP-16-01-KIST]
  3. Pioneer Research Center [2011-0027905]
  4. National Research Foundation of Korea(NRF) - Ministry of Science, ICT and Future Planning [2016K1A3A7A09005418, 2012K1A4A3053565, 2015M3D1A1070465, 2015R1C1A1A02037742]
  5. DGIST [17-BT-02]
  6. POSCO Science Fellowship of POSCO TJ Park Foundation
  7. Sookmyung Women's University
  8. U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division [DE-AC02-05-CH11231, KC2204]
  9. Ministry of Science & ICT (MSIT), Republic of Korea [17-BT-02] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
  10. National Research Council of Science & Technology (NST), Republic of Korea [CAP-16-01-KIST] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
  11. National Research Foundation of Korea [2011-0027905, 2012K1A4A3053565, 2015M3D1A1070465, 2016K1A3A7A09005418, 2015R1C1A1A02037742] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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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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