Ferromagnetic resonance and magnetic microstructure in nanocomposite films of Co x (SiO2)1 − x and (CoFeB) x (SiO2)1 − x

This paper reports on the results of the investigation of the relation between the magnetic microstructure and ferromagnetic resonance (FMR) in ferromagnetic metal-insulator composites by using granular alloys (Co41Fe39B20) x (SiO2)1 − x and Co x (SiO2)1 − x as an example. A comparative analysis of the properties of FMR spectra and parameters of random magnetic anisotropy leads to correlations between these quantities. It has been found that the main mechanism that determines the FMR line width in the films under investigation is the exchange narrowing mechanism.