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A variety of synchrotron radiation techniques like soft X-ray magnetic circular dichroism, near-edge as well as extended X-ray absorption fine structure, and synchrotron radiation X-ray diffraction have been used to characterise the crystal and electronic structure as well as the magnetic properties of superparamagnetic nanocrystalline samples with the nominal composition γ-Fe2O3. The results are compared with data from bulk reference samples like Fe3O4, Fe3—δO4, α-Fe2O3, and FeO.
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Pellegrain et al. (1999) studied this question.
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