Deterministic creation and deletion of a single magnetic skyrmion observed by direct time-resolved X-ray microscopy
- Authors
- 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
- Issue Date
- 5월-2018
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NATURE ELECTRONICS, v.1, no.5, pp.288 - 296
- Indexed
- SCOPUS
- Journal Title
- NATURE ELECTRONICS
- Volume
- 1
- Number
- 5
- Start Page
- 288
- End Page
- 296
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/76034
- DOI
- 10.1038/s41928-018-0070-8
- ISSN
- 2520-1131
- Abstract
- 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.
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Collections - Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles
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