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Influence of Cobalt Substitution on Hyperfine Interactions in (Fe_{1-x}Co_x)_{76}Mo_8Cu_1B_{15} Alloys

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Kaňčuch T., Miglierini M., Lancok A., Švec P., Illeková E.
Acta Physica Polonica A
|
2008
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vol. 113
|
issue 1
63-66
EN
The effect of cobalt substitution on structure, magnetic behaviour, magnetic arrangement, and hyperfine interactions in (Fe_{1-x}Co_x)_{76}Mo_8Cu_1B_{15} (x = 0, 0.1, 0.2, 0.25, 0.5) is studied by the Mössbauer spectrometry for both as-quenched and annealed alloys. Partial substitution of Fe by Co resulted in an enhancement of the average value of hyperfine magnetic field distributions as a function of x probably due to higher magnetic moment of Co. After annealing, a two-phase nanocrystalline structure composed of amorphous matrix and bcc-FeCo nanocrystallites was observed. Mössbauer spectra were fitted with up to four six-line patterns of narrow lines assigned to different number of Co nearest neighbours inside a bcc-FeCo lattice.
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