Abstract
Nanocomposites containing iron oxides and humic acids were studied by Mossbauer and magnetic measurements. The concentrations of humic acids as the precursor in nanocomposites were varied. Mossbauer investigations were carried out at temperature range from room temperature to 5 K. The magnetization M(T, H) was measured in the temperature interval 80–300 K and magnetic field up to 10 kOe. It was found that particles of investigated nanocomposites exhibit superparamagnetic properties. The core of the nanocomposite was a mixture of non-stoichiometric magnetite and maghemite. The “iron-polymer” interface was formed on the surface of the iron oxide particles.
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