Abstract
Magnetic anisotropies and line width of amorphous granular (Co 66.6 Fe 7.4 B 26 )−(SiO 2 ) films with various SiO 2 volume fraction ( v ) has been studied by using ferromagnetic resonance at 9 GHz. The perpendicular anisotropy (2 K up / M s ) is 3.25 kOe for v =0 vol.% and decreases with decrease in saturation magnetization (4π M s ) due to the increase in the SiO 2 fraction. Line width (Δ H ) has a strong dependence on the electrical resistivity ( ρ ) and coercive force ( H c ). Soft magnetic properties ( H c <1 Oe) are kept at Δ H <100 Oe ( v ≤20 vol.%).
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