Spin-wave excitation and propagation in microstructured waveguides of yttrium iron garnet/Pt bilayers

Journal Article · Mon Jan 06 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4861343· OSTI ID:22257145

Pirro, P.; Chumak, A. V.; Lägel, B.; Leven, B.; Hillebrands, B. ^[1]; Brächer, T. ^[1]; Dubs, C.; Surzhenko, O.; Görnert, P. ^[2]

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1. Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, D-67663 Kaiserslautern (Germany)
2. Innovent e.V., Prüssingstraße 27B, 07745 Jena (Germany)

We present an experimental study of spin-wave excitation and propagation in microstructured waveguides consisting of a 100 nm thick yttrium iron garnet/platinum (Pt) bilayer. The life time of the spin waves is found to be more than an order of magnitude higher than in comparably sized metallic structures, despite the fact that the Pt capping enhances the Gilbert damping. 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 31 μm is observed which is a significant step towards low damping, insulator based micro-magnonics.

• OSTI ID: 22257145
• Journal Information: Applied Physics Letters, Vol. 104, Issue 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EXCITATION
FERRITE GARNETS
LAYERS
LIGHT SCATTERING
MICROSTRUCTURE
PLATINUM
SPIN WAVES
WAVEGUIDES
YTTRIUM