Fernandez Barquin, L. ; Yedra, A. ; Kaul, S. N. ; Fdez-Gubieda, M. L. ; Mosselmans, J. F. W. ; Pankhurst, Q. A. (2007) X-ray absorption analysis of core/shell magnetic (Fe, Co)-B nanoparticles of amorphous and crystalline structure obtained by chemical reduction Journal of Non-Crystalline Solids, 353 (8-10). pp. 733-737. ISSN 0022-3093
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00223...
Related URL: http://dx.doi.org/10.1016/j.jnoncrysol.2006.12.096
Abstract
Core/shell nanoparticles of M-B (M = Fe, Co) with amorphous and mixed amorphous + bcc-Fe core have been synthesized by chemical reduction of metallic salts by sodium borohydride. The XANES spectra show the existence of a surface layer consisting of metallic hydroxides in a percentage around 15 at.%. The EXAFS reveals the existence of short-range order in the amorphous core with a contribution from the M-O pairs of the shell and a variation of the coordination numbers with respect to bulk alloys. The existence of Fe-bcc in the mixed alloys is observed in the Fourier transform of the EXAFS data.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Alloys; Transition Metals; Nanocrystals; X-ray Diffraction; Nanoparticles; Short-range Order; X-ray Absorption |
| ID Code: | 30036 |
| Deposited On: | 23 Dec 2010 03:40 |
| Last Modified: | 06 Jun 2011 08:52 |
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