Spin motive forces due to magnetic vortices and domain walls
| Autor: | Lucassen, M.E., Kruis, G.C.F.L., Lavrijsen, R., Swagten, H.J.M., Koopmans, B., Duine, R.A., Theoretical Physics, Sub Cond-Matter Theory, Stat & Comp Phys |
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| Přispěvatelé: | Physics of Nanostructures, Eindhoven Hendrik Casimir institute, Theoretical Physics, Sub Cond-Matter Theory, Stat & Comp Phys |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics Magnetic domain Field (physics) Condensed matter physics FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Magnetic field Vortex Condensed Matter - Other Condensed Matter Magnetization Domain wall (magnetism) Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Single domain 010306 general physics 0210 nano-technology Other Condensed Matter (cond-mat.other) Spin-½ |
| Zdroj: | Physical review. B, Condensed matter and materials physics, 84(1). American Physical Society Physical Review B, 84:014414, 1-7. American Physical Society Physical Review B |
| ISSN: | 1098-0121 |
| Popis: | We study spin motive forces, i.e, spin-dependent forces, and voltages induced by time-dependent magnetization textures, for moving magnetic vortices and domain walls. First, we consider the voltage generated by a one-dimensional field-driven domain wall. Next, we perform detailed calculations on field-driven vortex domain walls. We find that the results for the voltage as a function of magnetic field differ between the one-dimensional and vortex domain wall. For the experimentally relevant case of a vortex domain wall, the dependence of voltage on field around Walker breakdown depends qualitatively on the ratio of the so-called $\beta$-parameter to the Gilbert damping constant, and thus provides a way to determine this ratio experimentally. We also consider vortices on a magnetic disk in the presence of an AC magnetic field. In this case, the phase difference between field and voltage on the edge is determined by the $\beta$ parameter, providing another experimental method to determine this quantity. Comment: 8 pages, 9 figures, submitted to PRB |
| Databáze: | OpenAIRE |
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