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MA: Fachverband Magnetismus

MA 45: Magnonics I

MA 45.1: Vortrag

Donnerstag, 19. März 2020, 09:30–09:45, HSZ 401

Propagation of coherent spin waves in individual nano-sized yttrium iron garnet magnonic conduits — •B. Heinz^1,2, T. Brächer¹, M. Schneider¹, Q. Wang¹, B. Lägel³, A. M. Friedel¹, D. Breitbach¹, S. Steinert¹, T. Meyer⁴, M. Kewenig¹, C. Dubs⁵, P. Pirro¹, and A. V. Chumak^1,6 — ¹Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, Germany — ²Graduate School Materials Science in Mainz, Germany — ³Nano Structuring Center, TU Kaiserslautern, Germany — ⁴THATec Innovation GmbH, Germany — ⁵INNOVENT e.V., Technologieentwicklung Jena, Germany — ⁶Faculty of Physics, University of Vienna, Austria

Modern-days CMOS-based computation technology is reaching fundamental limitations. A promising path to overcome these limitations is the emerging field of magnonics which utilizes spin waves for data transport. However, the feasibility of this technology essentially relies on the scalability to the nanoscale and a proof that coherent spin waves can propagate in these structures. Here, we present a study of the spin-wave dynamics in individual yttrium iron garnet (YIG) magnonic conduits with lateral dimensions down to 50 nm. Space and time resolved micro-focused Brillouin-Light-Scattering spectroscopy is used to directly measure the spin-wave decay length and group velocity. Thereby, the first experimental proof of propagating spin waves in individual nano-sized YIG conduits is demonstrated. We acknowledge funding by ERC Starting Grant 678309 MagnonCircuits, DFG Grant DU 1427/2-1 and the Graduate School Material Science in Mainz.