/spl gamma/-Fe/sub 2/O/sub 3/ small particles (/spl les/10 nm) with various dispersion rates were studied by static magnetic measurements at low and medium applied fields. The results raise various questions concerning the determination of the non-relaxing magnetic moment and of the particle volume, the role of the particle surface and interactions.>
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Cherkaoui et al. (1994) studied this question.
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