Magnetic and Electronic Structure Studies of Nanocrystalline (Co2Mn)40 Ni60 Alloy |
| N. Daddaa, K. Daddab, W. Bouchelaghemc, M. Medjaldid, S. Allegb, M. Bououdinae, E.K. Hlilf
aLaboratoire de Synthèse et Biocatalyse Organique (LSBO), Département de Chimie, Université Badji Mokhtar Annaba, B.P. 12, Annaba 23000, Algeria bLaboratoire de Magnétisme et Spectroscopie des Solides (LM2S), Département de Physique, Université Badji Mokhtar Annaba, B.P. 12, Annaba 23000, Algeria cLaboratoire de Chimie des Matériaux Inorganiques, Département de Chimie, Université Badji Mokhtar Annaba, B.P. 12, Annaba 23000, Algeria dDépartement Génie Industriel, Faculté des Sciences et Technologie, Université Abbes Laghrour Khenchela, Khenchela 40000, Algeria eDepartment of Physics, College of Science, University of Bahrain, PO Box 32038, Kingdom of Bahrain fUniversité Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France |
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| Nanocrystalline (Co2Mn)40Ni60 (wt%) alloy powder was prepared by high-energy ball milling under an argon atmosphere. Structure, microstructure, and magnetic properties were investigated by means of X-ray diffraction, scanning electron microscopy, and vibrating sample magnetometry. The X-ray diffraction analysis indicates that after 30 h of milling, a highly disordered (Co, Mn, Ni) solid solution emerges, having an average crystallite size of around 60 nm and a lattice parameter of about 3.5411 Å. Magnetization-field curves indicate the existence of ferromagnetic behavior irrespective of the milling time with a low hysteresis loop, a typical characteristic of a soft magnetic material. The magnetic properties, however, are found to be sensitive to the milling time: i.e. the ratio Mr/Msat manifests the formation of multi-domains magnetic structure. Diverse magnetic parameters were acquired from the approach to magnetic saturation. The electronic structure of the ferromagnetic (Co2Mn)40Ni60 alloy performed by self-consistent ab initio calculations based on the Korringa-Kohn-Rostocker method combined with the coherent potential approximation, reveals that the total DOS is mainly due to the 3d-like states of the constituent elements Mn, Co and Ni. |
DOI:10.12693/APhysPolA.140.153 topics: ball milling, Ni-Co-Mn powder mixture, magnetic properties, electronic structure calculation |