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

Seonghoon Woo, Kyung Mee Song, Hee Sung Han, Min Seung Jung, Mi Young Im, Ki Suk Lee, Kun Soo Song, Peter Fischer, Jung Il Hong, Jun Woo Choi, Byoung Chul Min, Hyun Cheol Koo, Joonyeon Chang

Research output: Contribution to journalArticle

49 Citations (Scopus)

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.

Original languageEnglish
Article number15573
JournalNature communications
Volume8
DOIs
Publication statusPublished - 2017 May 24

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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