2013/11/25 by Philipp Pirro, P. Pirro, T. Brächer +11 · 172 citations
Chemistry · Engineering · Physics and Astronomy · #Bilayer #Brillouin zone #Chemistry #Condensed matter physics #Excitation #Ferromagnetism #Magnetic properties of thin films #Magneto-Optical Properties and Applications #Magnonics #Materials science #Photonic and Optical Devices #Physics #Spin Hall effect #Spin polarization #Spin wave #Yttrium iron garnet #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.4861343
published in Applied Physics Letters 104(1) (American Institute of Physics)
arxiv created 2013/11/25 · openalex publication_date 2014/01/06 · arxiv updated 2015/03/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.