In this article synthesis and study of iron oxide nanopowders are described. The synthesis of sample 1 and sample 2-iron oxides-was carried out by electric arc plasma cutting of ordinary steel. The sample 3 was prepared by evaporation of Fe 2 O 3 /FeO mixture in radio-frequency nitrogen plasma. The characterization of the as prepared iron oxide nanoproducts was achieved by means of Mössbauer spectroscopy and X-ray diffraction analysis. The presence of different phases of iron oxide with a basic phase Fe 3−x O 4 (magnetite), additional Fe 1−x O (wüstite) and α or γ -Fe 2 O 3 (hematite or maghemite) with superparamagnetic particles for sample 1 and sample 2 and Fe 3−x O 4 (magnetite) for sample 3 is observed.