Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Poster I
MA 19.32: Poster
Dienstag, 1. April 2014, 13:00–15:30, P1
Spin-wave excitation and propagation in microstructured waveguides of yttrium iron garnet /platin bilayers — •Philipp Pirro1, Thomas Brächer1,2, Andrii Chumak1, Carsten Dubs3, Oleksii Surzhenko3, Peter Görnert3, Britta Leven1, and Burkard Hillebrands1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, Gottlieb-Daimler-Strasse 47, D-67663 Kaiserslautern — 3Innovent e.V., Prüssingstraße 27B, 07745 Jena, Germany
In the field of magnon-spintronics, the investigation of propagating spin waves in micro-sized waveguides has attracted growing interest as they constitute the backbone of all magnonic circuits. Here, we present an experimental study of spin-wave excitation and propagation in microstructured waveguides patterned from a 100 nm thick yttrium iron garnet (YIG)/platinum (Pt) bilayer. The Pt capping enhances the Gilbert damping, but, nevertheless, the life time of the spin waves is more than an order of magnitude higher than in comparably sized metallic structures. Utilizing microfocus Brillouin light scattering spectroscopy, we reveal the spin-wave mode structure for different excitation frequencies. An exponential spin-wave amplitude decay length of up to 31 µm is observed.
Financial support by the OPTIMAS Car Zeiss Doktoranden Programm and the Graduate School Materials Science in Mainz is acknowledged.