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A representative nanocomposite made of ferrimagnetic γ-Fe 2 O 3 and antiferromagnetic α-Fe 2 O 3 nanoparticles with estimated weight fractions of ∼90 and ∼10%, respectively, and grown in transparent silica xerogels has been characterized by Mössbauer spectroscopy with respect to the temperature. The changes of the hyperfine parameters of the different subspectral components...
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