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Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 15: Magnetism Poster A

MA 15.46: Poster

Dienstag, 2. April 2019, 10:00–13:00, Poster E

Spin-wave propagation in individual sub-micron YIG magnonic conduits — •Björn Heinz1,2, Thomas Brächer1, Michael Schneider1, Philipp Pirro1, Bert Lägel1, David Breitbach1, Anna M. Friedel1, Carsten Dubs3, and Andrii V. Chumak11Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, Staudingerweg 9, 55128 Mainz, Germany — 3INNOVENT e.V., Technologieentwicklung Jena, 07745 Jena, Germany

Yttrium iron garnet (YIG) is a unique material with outstanding magnetic properties such as the lowest known spin-wave damping. It is therefore well suited for the investigation of fundamental spin-wave dynamics and a promising candidate for the application in spin-wave based circuits and logic devices. In this work, we study the impact of nanostructuring by means of electron beam lithography and successive ion milling on individual spin-wave waveguides. These structures are fabricated from a 44 nm thin film grown by liquid phase epitaxy (LPE). Their width varies from a few microns down to the sub-100 nm regime. By exciting the magnetization dynamics with a coplanar waveguide antenna and performing spacial resolved Brillouin light scattering (BLS) microscopy measurements, we investigate the spin-wave decay length in these conduits in dependency on the conduit width. Additionally the spin-wave mode spectra are extracted by means of thermal BLS measurements. This research has been supported by ERC Starting Grant 678309 MagnonCircuits and DFG Grant DU 1427/2-1.

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