Woo, Seonghoon Song, Kyung Mee Han, Hee-Sung Jung, Min-Seung Im, Mi-Young Lee, Ki-Suk Song, Kun Soo Fischer, Peter Hong, Jung-Il Choi, Jun Woo Min, Byoung-Chul Koo, Hyun Cheol Chang, Joonyeon 2024-01-20T01:33:24Z 2024-01-20T01:33:24Z 2021-09-01 2017-05 2041-1723 https://pubs.kist.re.kr/handle/201004/122808 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. English Nature Publishing Group Spin-orbit torque-driven skyrmion dynamics revealed by time-resolved X-ray microscopy Article 10.1038/ncomms15573 1 Nature Communications, v.8 Nature Communications 8 Y scie scopus 000401961800001 2-s2.0-85019848778 Multidisciplinary Sciences Science & Technology - Other Topics Article ROOM-TEMPERATURE LATTICE