Deterministic creation and deletion of a single magnetic skyrmion observed by direct time-resolved X-ray microscopy
| Autor: | Woo, Seonghoon, Song, Kyung Mee, Zhang, Xichao, Ezawa, Motohiko, Zhou, Yan, Liu, Xiaoxi, Weigand, Markus, Finizio, S., Raabe, J., Park, Min-Chul, Lee, Ki-Young, Choi, Jun Woo, Min, Byoung-Chul, Koo, Hyun Cheol, Chang, Joonyeon |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Nature Electronics 1, 288 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s41928-018-0070-8 |
| Popis: | 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. Comment: 27 pages, 4 figures |
| Databáze: | arXiv |
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