Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8154327 | Journal of Magnetism and Magnetic Materials | 2017 | 27 Pages |
Abstract
Single-phase(Fe0.7Co0.3)100âxSix nanostructured powders (x=0,5, 10, 15 and 20) have been elaborated by mechanical alloying in order to investigate the effect of silicon on the microstructure and magnetic properties of these alloys. A disordered Fe(Co, Si) solid solution with body centred cubic (bcc) crystal structure is formed after 72Â h of milling for all the compositions. The addition of Si gives rise to a progressive decrease of the lattice parameter, from about 2.865Â Ã
for the binary Fe70Co30 compound down to 2.841Â Ã
for the powder with x=20. The sample with the uppermost Si content exhibits the lowest value for the mean grain size (â10Â nm) as well as the largest microstrain (above 1.1%). All the samples are ferromagnetic at room temperature, although the saturation magnetization value reduces almost linearly by adding Si to the composition. A similar trend is observed for the hyperfine magnetic field obtained from the analysis of the room temperature Mössbauer spectra. The hyperfine field distributions show a broad double-peak shape for x>0, which can be ascribed to multiple local environments for the Fe atoms inside a disordered solid solution.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
M. Hocine, A. Guittoum, M. Hemmous, D. MartÃnez-Blanco, P. Gorria, B. Rahal, J.A. Blanco, J.J. Sunol, A. Laggoun,