Core/shell nanoparticles with both metallic iron and iron boron cores were synthesized via the reverse micellar method and characterized by x-ray absorption spectroscopy, employing x-ray absorption near edge structure and extended x-ray absorption fine structure in an integrated fashion. The particles were found to comprise an amorphous iron boron phase, a disordered iron oxide phase, and, in some cases, a crystalline bcc metallic iron phase.
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Calvin et al. (2003) studied this question.
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