Figure 3
From: Magnetic domain interactions of Fe3O4 nanoparticles embedded in a SiO2 matrix
Magnetization responses from Fe3O4/SiO2: (a) H vs M as a function of the stirring time for well dispersed NPs as individual SSD at 4 h shows a lower magnetization. The amorphous SiO2 barrier between NPs reduces the magnification of 2, 4, 8, and 12 h of processing. Superparamagnetic signals as close loops were observed in all cases. (b,c) Differences in the magnetization due to the changes in the magnetic permeability. The magnetization saturation decreases with the μ r of the SiO2 matrix media and the separation of NPs as SSD.
