Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 31: Magnonics I

MA 31.3: Vortrag

Mittwoch, 14. März 2018, 15:45–16:00, H 0110

Spin pinning conditions in nano-scale spin-wave waveguides — Qi Wang¹, Roman Verba², Martin Kewenig¹, Björn Heinz¹, Philipp Pirro¹, Thomas Meyer¹, Carsten Dubs³, •Thomas Brächer¹, and Andrii Chumak¹ — ¹Fachbereich Physik, Technische Universitaet Kaiserslautern, Kaiserslautern, Germany — ²Institute of Magnetism, Kyiv 03680, Ukraine — ³INNOVENT e.V., Technologieentwicklung, Prüssingstraße 27B, 07745 Jena, Germany

The research field of magnonics deals with the transport of information via spin waves in ever decreasing spin-wave conduits. As the used spin-wave waveguides approach nanometric scales, the spin-wave mode profiles have to be revisited. In particular, if the lateral sizes of the waveguide approaches the exchange length, dipolar pinning is not dominant anymore. Studying the model system yttrium iron garnet (YIG), we demonstrate that this leads to an exchange-mediated unpinning in waveguides with widths on the order of 100 nm and we discuss the impact of this unpinning on the spin-wave spectra. This research has been supported by ERC Starting Grant 678309 MagnonCircuits and DFG Grant DU 1427/2-1.