Influence of Cobalt Substitution on Hyperfine Interactions in Fe1-xCox)76Mo8Cu1B15 Alloys

T. Kaňčuch a, b, M. Miglierini a, c, A. Lancok b, P. Švec d and E. Illeková d a Department of Nuclear Physics and Technology, Slovak University of Technology, Ilkovičova 3, 812 19 Bratislava, Slovakia b Inst. Inorganic Chemistry AS CR, v.v.i., 250 68 Řež, Czech Republic c Nanomaterials Research Centre, 771 46 Olomouc, Czech Republic d Institute of Physics, Slovak Academy of Sciences, D'ubravská cesta 9, 845 11 Bratislava, Slovakia

Full Text PDF

Received: 9 07 2007;

The effect of cobalt substitution on structure, magnetic behaviour, magnetic arrangement, and hyperfine interactions in (Fe1-xCox)76Mo8Cu1B15 (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.

DOI: 10.12693/APhysPolA.113.63 PACS numbers: 61.46.-w, 75.75.+a, 76.80.+y