EFFECT OF PERCOLATION PROCESSES ON FERROMAGNETIC RESONANCE AND MAGNETO-OPTICAL PROPERTIES OF GRANULAR NANOCOMPOSITES

摘要

The concentration dependences of the spectra of the magnetooptical Kerr effect and the ferromagnetic resonance in magnetically inhomogeneous amorphous granular nanocomposite films of (Co_(84)Nb_(14)Ta_2)_x(SiO_2)_(100-x) (30 ≤ x ≤ 60 at. %) were investigated. The changes found in the spectra of the magneto-optical Kerr effect and the ferromagnetic resonance are related to transformations of the microstructure and topology of magnetic nanocomposites. It was shown that the equatorial Kerr effect in compositions belonging to the percolation region increases by an order of magnitude.