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Two samples of nanopowders containing superparamagnetic Fe3C and Fe3O4/γ–Fe2O3 particles and carbon black were synthesized by the method of laser‐induced homogeneous pyrolysis of gaseous precursors. Both were characterized by XRD, HR‐TEM, Mössbauer spectrometry and standard magnetic measurements. The mean crystallite size of Fe3C was 3 nm for the first sample and 10 nm for the second sample. Fe3C...
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