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Powder and foils containing up to 40% alpha"Fe 16 N 2 have been prepared by annealing nitrogen-martensite. The magnetization of the alpha" phase is deduced from magnetization measurements, coupled with a quantitative phase analysis based on Mossbauer spectra. At room temperature the values are 225-270 J T -1 kg -1 corresponding to J s =2.1-2.5 T. The average iron moment at T approximately O K is 2.3-2.6 mu B, which is in accord with the results of spin-polarized band structure calculations.
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Coey et al. (1994) studied this question.
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