Magnon Brillouin scattering in FeSi sputtered films

摘要

Thermally excited spin waves in sputtered FeSi films (2.6 wt.  of Si) have been studied at room temperature by Brillouin scattering in external magnetic fields of up to 4.0 kOe. Scattering from the Damon–Eshbach surface mode and the standing spin waves has been observed. The magnetic constants of the FeSi films are determined as follows: ggr;/2pgr; =2.87±0.06 GHz/kOe,g=2.05±0.04, 4pgr;Ms=19.9±0.4 kG, 4pgr;Mb=20.1±0.4 kG, andDb=1.18±0.24×10−9Oe cm2. Here, the subscriptssandbrefer to surface and bulk, respectively.