FMR and SMFMR study of Fe/Si multilayers

Abstract
In this paper the investigations of magnetic and magnetoelastic properties of Fe/Si multilayers are presented. The multilayers have been grown by de sputtering on the single - crystal GaAs substrates. Ferromagnetic resonance (FMR) measurements were performed at the frequency of 9.4 GHz and in the temperature range from liquid helium to room temperature before and after illumination with 514nm light. The magnetostriction constant of investigated films has been measured at room temperature by strain modulated ferromagnetic resonance (SMFMR) method. An attention is given to the effect of the interface on the observed effective saturation magnetostriction. The FMR and SMFMR measurements mostly revealed the contribution from interface to the observed spectra. The results were analyzed taking into account both the alloying effects and the intrinsic surface anisotropy and magnetostriction. It was show that in the case of Fe/Si multilayers the effect of alloying prevails.