Magnetic and Magnetoresonance Properties of Multilayered Systems Based on (CoFeB)_x-(SiO₂)_100-x Composite Layers

Abstract

Magnetic properties and ferromagnetic resonance data of (Co41Fe39B20)x-(SiO2)100-x composite films and multilayer structures composed of these films separated by SiC interlayers have been studied. It has been shown that one of the possible causes responsible for the differences of magnetic properties of composites and multilayer structures can be different shapes of magnetic particles and granules in these materials.

The state of individual layers and interfaces in multilayer nanostructures [(Co40Fe40B20)34(SiO2)66/ZnO/C]46

“…It should be noted that when the thickness of the metal‐containing nanocomposite layers increases, their average density also increases from 3.81 for ML‐I to 4.02 g/cm 3 for ML‐III approaching the values calculated for a composite of this composition ρ comp = 4.2 g/cm 3 . The density of such a composite was calculated according to the equation 25 : where c is the concentration of CoFeB clusters in the SiO 2 matrix, which in our case is 34%. Here ρ comp is the nanocomposite density, ρ CoFeB = 7.5 g/cm 3 is the Co 40 Fe 40 B 20 alloy density, and = 2.5 g/cm 3 is the silicon oxide density.…”

“…It should be noted that when the thickness of the metal-containing nanocomposite layers increases, their average density also increases from 3.81 for ML-I to 4.02 g/cm 3 for ML-III approaching the values calculated for a composite of this composition ρ comp = 4.2 g/cm 3 . The density of such a composite was calculated according to the equation 25 :…”