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29 March 2024
 
  » arxiv » 1412.4032

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Spin waves in micro-structured yttrium iron garnet nanometer-thick films
Matthias B. Jungfleisch ; Wei Zhang ; Wanjun Jiang ; Houchen Chang ; Joseph Sklenar ; Stephen M. Wu ; John E. Pearson ; Anand Bhattacharya ; John B. Ketterson ; Mingzhong Wu ; Axel Hoffmann ;
Date 12 Dec 2014
AbstractWe investigated the spin-wave propagation in a micro-structured yttrium iron garnet waveguide of $40$ nm thickness. Utilizing spatially-resolved Brillouin light scattering microscopy, an exponential decay of the spin-wave amplitude of $(10.06 pm 0.83)$ $mu$m was observed. This leads to an estimated Gilbert damping constant of $alpha=(8.79pm 0.73) imes 10^{-4}$, which is larger than damping values obtained through ferromagnetic resonance measurements in unstructured films. The theoretically calculated spatial interference of waveguide modes was compared to the spin-wave pattern observed experimentally by means of Brillouin light scattering spectroscopy.
Source arXiv, 1412.4032
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