Control of the chirality and polarity of magnetic vortices in triangular nanodots
| Autor: | Jaafar, M., Yanes, R., de Lara, D. Perez, Chubykalo-Fesenko, O., Asenjo, A., Gonzalez, E. M., Anguita, J. V., Vazquez, M., Vicent, J. L. |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | PHYSICAL REVIEW B 81, 054439 2010 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.81.054439 |
| Popis: | Magnetic vortex dynamics in lithographically prepared nanodots is currently a subject of intensive research, particularly after recent demonstration that the vortex polarity can be controlled by in-plane magnetic field. This has stimulated the proposals of non-volatile vortex magnetic random access memories. In this work, we demonstrate that triangular nanodots offer a real alternative where vortex chirality, in addition to polarity, can be controlled. In the static regime, we show that vortex chirality can be tailored by applying in-plane magnetic field, which is experimentally imaged by means of Variable-Field Magnetic Force Microscopy. In addition, the polarity can be also controlled by applying a suitable out-of-plane magnetic field component. The experiment and simulations show that to control the vortex polarity, the out-of-plane field component, in this particular case, should be higher than the in-plane nucleation field. Micromagnetic simulations in the dynamical regime show that the magnetic vortex polarity can be changed with short-duration magnetic field pulses, while longer pulses change the vortex chirality. Comment: 18 pages, 11 figures |
| Databáze: | arXiv |
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