Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 48: Magnetization / Demagnetization Dynamics IV

MA 48.6: Vortrag

Donnerstag, 19. März 2015, 16:15–16:30, EB 301

Spin-wave propagation within domain-walls — •Kai Wagner, Thomas Sebastian, Attila Kákay, and Helmut Schultheiss — Institut für Ionenstrahlphysik und Materialforschung, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany

Research efforts to deploy spin waves as information carriers in micro- and nano-structured ferromagnetic materials have increased tremendously over the recent years. However, tailoring guided spin-wave propagation in two dimensions still remains a delicate challenge. Here we demonstrate spin-wave transport inside a domain-wall. For this, we perform micromagnetic simulations for thin film elements in a Landau state. To excite spin-wave resonances inside the domain-wall we apply pulsed as well as cw-excitation in a constricted area at the domain-wall-edge. We find several spin-wave modes of different energies with well distinguished wave vectors. They exhibit a positive dispersion and propagate along the domain-wall towards the vortex core. Domain-walls, thus, open the perspective for reprogrammable and yet non-volatile spin-wave waveguides of nanometer width. Financial support by the Deutsche Forschungsgemeinschaft within project SCHU2922/1-1 is gratefully acknowledged.