Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Mechanical alloying and theoretical studies of MnAl(C) magnets

Abstract : Mn 55 Al 45 , Mn 55 Al 44 C 1 , Mn 52.2 Al 45.8 C 2 and Mn 54.2 Al 43.8 C 2 were synthesized by the mechanical alloying method. It was the first time that a high purity s phase up to 99% of weight percentage was obtained in Mn 54.2 Al 43.8 C 2 , which gave the highest saturation magnetization M s = 570 kAm À1 ever reported by mechanical alloying up to date. The crystallite size of the s phase of MnAl(C) alloy decreased with increasing carbon doping, varying from 79 to 159 nm. Additionally, the coercivity (H c) was found to be inversely proportional to the crystallite size of s phase. Effect of doping carbon and its position in the s phase of MnAl(C) alloy were also investigated for the first time by first-principle calculations. It was found that by inserting carbon at the interstitial site in the tetragonal structure, a strong stabilization effect and an expansion of unit cell were observed, which are in good agreement with the experimental results. Moreover, our results indicate that carbon doping reduces the magnetic moment of Mn.
Type de document :
Article dans une revue
Liste complète des métadonnées

Littérature citée [55 références]  Voir  Masquer  Télécharger
Contributeur : Florent Calvayrac Connectez-vous pour contacter le contributeur
Soumis le : lundi 17 décembre 2018 - 11:28:35
Dernière modification le : mardi 4 janvier 2022 - 04:59:54
Archivage à long terme le : : lundi 18 mars 2019 - 12:20:03


Fichiers produits par l'(les) auteur(s)




Van Tang Nguyen, Florent Calvayrac, Anna Bajorek, Nirina Randrianantoandro. Mechanical alloying and theoretical studies of MnAl(C) magnets. Journal of Magnetism and Magnetic Materials, Elsevier, 2018, 462, pp.96 - 104. ⟨10.1016/j.jmmm.2018.05.001⟩. ⟨hal-01906072⟩



Consultations de la notice


Téléchargements de fichiers