Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 9: Magnetic domain walls
MA 9.3: Vortrag
Montag, 12. März 2018, 15:30–15:45, EB 202
Effective description of domain walls as extended structures — •Davi Rohe Rodrigues1,2,3, Karin Everschor-Sitte2,4, Jairo Sinova2, and Artem Abanov1 — 1Department of Physics & Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA — 2Institute of Physics, Johannes Gutenberg Universitat, 55128 Mainz, Germany — 3Graduate School Materials Science in Mainz, Staudingerweg 9, 55128 Mainz, Germany — 4Institute of Physics ASCR, v.v.i, Cukrovarnicka 10, 162 00 Prag 6, Czech Republic
Domain walls are often treated as one-dimensional objects whose dynamics is described by two soft modes, its position and azimuthal angle. In thin films, however, domain walls exhibit a richer structure including vortices and curvatures. We propose an effective description for domain walls as extended objects with local degrees of freedom. Our description includes tilted[1,2] domain walls, vortices[3], and more complex configurations. We analyze the transport of spin waves along the domain walls and the formation of cusps. Furthermore, considering Skyrmions as closed domain walls, we study the effects of deformations along their borders. Going beyond the often used circular approximation for skyrmions[4] we find for example that deformations in the skyrmion shape travel along its border. [1] Boulle, et al, PRL 111 (2013); [2] Muratov, et al, PRB 96, 134417 (2017); [3] Tretiakov, et al, PRL 100, 127204 (2008); [4] Rodrigues, et al, (manuscript in preparation).