Magnetic Skyrmion Generation by Reflective Spin Wave Focusing
| Autor: | Zhizhi Zhang, Zhenyu Wang, Xianglong Yao, Yunshan Cao, Zhi-xiong Li, Menghua Deng, Peng Yan |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
QC1-999
Materials Science (miscellaneous) Biophysics FOS: Physical sciences General Physics and Astronomy Magnetic skyrmion Spin wave Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Physical and Theoretical Chemistry total reflection Mathematical Physics Topological quantum number magnetic droplet Physics Magnonics Condensed Matter - Materials Science Total internal reflection Condensed Matter - Mesoscale and Nanoscale Physics Spintronics Condensed matter physics Magnon Skyrmion Materials Science (cond-mat.mtrl-sci) Condensed Matter::Mesoscopic Systems and Quantum Hall Effect spin-wave focusing magnetic skyrmion magnon |
| Zdroj: | Frontiers in Physics, Vol 9 (2021) |
| ISSN: | 2296-424X |
| DOI: | 10.3389/fphy.2021.729967 |
| Popis: | We propose a method to generate magnetic skyrmions by focusing spin waves totally reflected by a curved film edge. Based on the principle of identical magnonic path length, we derive the edge contour that is parabolic and frequency-independent. Micromagnetic simulations are performed to verify our theoretical design. It is found that under proper conditions, magnetic droplet first emerges near the focal point where the spin-wave intensity has been significantly enhanced, and then converts to magnetic skyrmion accompanied by a change of the topological charge. The phase diagram about the amplitude and frequency of the driving field for skyrmion generation is obtained. Our finding would be helpful for the designment of spintronic devices combing the advantage of skyrmionics and magnonics. Comment: 5 pages, 5 figures |
| Databáze: | OpenAIRE |
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