FMR INVESTIGATION OF ION-BEAM SYNTHESISED IRON SILICIDES

Abstract

Ferromagnetic films Fe3Si were synthesized by Fe+ ion implantation in single-crystal silicon substrates during applied external magnetic field. MOKE measurements showed that all samples synthesized at specific regimes of implantation are ferromagnetic at room temperature. Magnetic field during the high-dose Fe+ ion implantation led to the pronounced in-plane magnetic anisotropy in the synthesized films. It was shown that for isotropic samples the FMR linewidth rises with temperature decrease, whereas FMR linewidth for anisotropic samples is nearly constant with temperature variation. The experimental results are well explained in the frame of Raikher model of magnetic resonance for dynamic susceptibility of ensemble of single-domain anisotropic particles.