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

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

We 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 ± 0.83) μm was observed. This leads to an estimated Gilbert damping constant of α=(8.79±0.73)×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.

Original languageEnglish (US)
Article number17D128
JournalJournal of Applied Physics
Volume117
Issue number17
DOIs
StatePublished - May 7 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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