Woo, Seonghoon Song, Kyung Mee Zhang, Xichao Ezawa, Motohiko Zhou, Yan Liu, Xiaoxi Weigand, Markus Finizio, Simone Raabe, Jorg Park, Min-Chul Lee, Ki-Young Choi, Jun Woo Min, Byoung-Chul Koo, Hyun Cheol Chang, Joonyeon 2024-01-19T23:00:24Z 2024-01-19T23:00:24Z 2021-09-03 2018-05 2520-1131 https://pubs.kist.re.kr/handle/201004/121407 Spintronic devices based on magnetic skyrmions are a promising candidate for next-generation memory applications due to their nanometre size, topologically protected stability and efficient current-driven dynamics. Since the recent discovery of room-temperature magnetic skyrmions, there have been reports of current-driven skyrmion displacement on magnetic tracks and demonstrations of current pulse-driven skyrmion generation. However, the controlled annihilation of a single skyrmion at room temperature has remained elusive. Here we demonstrate the deterministic writing and deleting of single isolated skyrmions at room temperature in ferrimagnetic GdFeCo films with a device-compatible stripline geometry. The process is driven by the application of current pulses, which induce spin-orbit torques, and is directly observed using a time-resolved nanoscale X-ray imaging technique. We provide a current pulse profile for the efficient and deterministic writing and deleting process. Using micromagnetic simulations, we also reveal the microscopic mechanism of the topological fluctuations that occur during this process. English NATURE PUBLISHING GROUP Deterministic creation and deletion of a single magnetic skyrmion observed by direct time-resolved X-ray microscopy Article 10.1038/s41928-018-0070-8 1 NATURE ELECTRONICS, v.1, no.5, pp.288 - 296 NATURE ELECTRONICS 1 5 288 296 scopus 000444075900011 2-s2.0-85055094994 Engineering, Electrical & Electronic Engineering Article CURRENT-DRIVEN DYNAMICS LATTICE MOTION Spintronics Skyrmion