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Magnetization curves of the SiO2-coated xAg/Fe2O3 samples. The magnetization values have been normalized for an equal mass of Fe2O3. The inset shows a magnification at low magnetic fields highlighting the coercivity and remanence of the particles. The hybrid SiO2-coated Ag/Fe2O3 nanoparticles exhibit a near superparamagnetic behavior.
