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

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.
Authors:
; ; ; ;  [1] ;  [1] ;  [2] ; ; ;  [3]
  1. Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, D-67663 Kaiserslautern (Germany)
  2. (Germany)
  3. Innovent e.V., Prüssingstraße 27B, 07745 Jena (Germany)
Publication Date:
OSTI Identifier:
22257145
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; EXCITATION; FERRITE GARNETS; LAYERS; LIGHT SCATTERING; MICROSTRUCTURE; PLATINUM; SPIN WAVES; WAVEGUIDES; YTTRIUM