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| Titre: | The role of silicon on the microstructure and magnetic behaviour of nanostructured (Fe0.7Co0.3)100_xSix powders |
| Auteur(s): | Hocine, M.
Guittoum, A.
Hemmous, M.
Martínez-Blanco, D.
Gorria, P.
Rahal, B.
Blanco, J.A.
Sunol, J.J.
Laggoun, A. |
| Mots-clés: | FeCoSi compound
Nanostructuredpowders
Mechanical alloying
Magnetic properties |
| Date de publication: | 2017 |
| Editeur: | Elsevier |
| Collection/Numéro: | Journal of Magnetism and Magnetic Materials;PP.149-156 |
| Résumé: | Single-phase(Fe0.7Co0.3)100 xSix nanostructured powders(x¼0,5, 10,15and20)havebeenelaboratedby
mechanical alloyinginordertoinvestigatetheeffectofsilicononthemicrostructureandmagnetic
properties ofthesealloys.AdisorderedFe(Co,Si)solidsolutionwithbodycentredcubic(bcc)crystal
structure isformedafter72hofmillingforallthecompositions.TheadditionofSigivesrisetoapro-
gressivedecreaseofthelatticeparameter,fromabout2.865ÅforthebinaryFe70Co30 compound downto
2.841Åforthepowderwith x¼20. ThesamplewiththeuppermostSicontentexhibitsthelowestvalue
for themeangrainsize(E10nm)aswellasthelargestmicrostrain(above1.1%).Allthesamplesare
ferromagnetic atroomtemperature,althoughthesaturationmagnetizationvaluereducesalmostlinearly
by addingSitothecomposition.Asimilartrendisobservedforthehyperfine magnetic field obtained
from theanalysisoftheroomtemperatureMössbauerspectra.Thehyperfine field distributionsshowa
broad double-peakshapefor x40, whichcanbeascribedtomultiplelocalenvironmentsfortheFe
atoms insideadisorderedsolidsolution |
| URI/URL: | http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/5228 |
| ISSN: | 0304-8853 |
| Collection(s) : | Publications Internationales
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