Abstract
We have investigated the propagation of surface spin waves in a Permalloy thin film excited by an asymmetric coplanar antenna. A surprising oscillatory behavior superimposed on the exponential decay is observed in the spin wave intensity mapped with the micro-Brillouin light scattering technique. The oscillations can be modeled as the interference between a propagating spin wave and a background magnetization with spatially uniform phase. We use a simple closed-form equation that includes both contributions to fit our experimental results. From the fit results, we extract the spin wave propagation length and the spin wave vector in a frequency range limited by the antenna bandwidth.
Original language | English (US) |
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Article number | 252409 |
Journal | Applied Physics Letters |
Volume | 101 |
Issue number | 25 |
DOIs | |
State | Published - Dec 17 2012 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)