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Dakhlaoui, A., Smiri, L. S., Babadjian, G., Schoenstein, F., Molinie, P. & Jouini, N. (2008) Controlled elaboration and magnetic properties of submicrometric cobalt fibers. J. Phys. Chem. C, 112 14348–14354.
Added by: Laurent Cournède (2016-03-10 21:58:41) |
| Type de référence: Article DOI: 10.1021/jp804461s Numéro d'identification (ISBN etc.): 1932-7447 Clé BibTeX: Dakhlaoui2008 Voir tous les détails bibliographiques  |
Catégories: IMN Mots-clés: anisotropy, behavior, co nanowires, co/coo, particles, Polyol, temperature Créateurs: Babadjian, Dakhlaoui, Jouini, Molinie, Schoenstein, Smiri Collection: J. Phys. Chem. C |
Consultations : 1/1006
Indice de consultation : 7% Indice de popularité : 1.75% |
| Résumé |
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Hexagonal close-packed cobalt fibers with a narrow size distribution and a submicrometric diameter have been Successfully synthesized using a modified polyol process in the presence of an applied magnetic field of 500 Oe. The X-ray diffraction (XRD) and the scanning electron microscopy characterization showed that the structure, size, morphology, and dispersion of the as-prepared fibers were widely influenced by the synthesis parameters (hydrolysis ratio, reactant concentration, reaction temperature, and time). The selected area electron diffraction pattern revealed that the as-prepared fibers are polycrystalline. Magnetic measurements on cobalt samples showed enhancement of their ferromagnetic properties, which may be attributed to their anisotropic shape. Irreversibility in the zero-field-cooling and field-cooling measurements was observed and could be interpreted in terms of the unblocking of magnetization of small-domain particles and domain wall depinning of larger multidomain particles.
Added by: Laurent Cournède |