Curvature-driven AC-assisted creep dynamics of magnetic domain walls
| Autor: | Domenichini, P., Paris, F. N., Capeluto, M. G., Granada, M., George, J. -M., Pasquini, G., Kolton, A. B. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 103, 220409 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.103.L220409 |
| Popis: | The dynamics of micrometer-sized magnetic domains in ultra-thin ferromagnetic films is so dramatically slowed down by quenched disorder that the spontaneous elastic tension collapse becomes unobservable at ambient temperature. By magneto-optical imaging we show that a weak zero-bias AC magnetic field can assist such curvature-driven collapse, making the area of a bubble to reduce at a measurable rate, in spite of the negligible effect that the same curvature has on the average creep motion driven by a comparable DC field. An analytical model explains this phenomenon quantitatively. Comment: 5 pages, 3 figures. Ancillary Material included |
| Databáze: | arXiv |
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