Mossbauer analysis of the phase distribution present in nanoparticulate Fe/SiO2 samples

Authors
de Julian, C Alcazar, GAP Cebollada, F Montero, MI Gonzalez, JM Marco, JF
Citation
C. De Julian et al., Mossbauer analysis of the phase distribution present in nanoparticulate Fe/SiO2 samples, J MAGN MAGN, 203, 1999, pp. 175-177
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
ISSN journal
03048853 → ACNP
Volume
203
Year of publication
1999
Pages
175 - 177
Database
ISI
SICI code
0304-8853(199908)203:<175:MAOTPD>2.0.ZU;2-5
Abstract
Results are presented on the phase distribution and magnetic properties of nanoparticulate Fe/SiO2, samples prepared by high-energy ball milling. From our data, we suggest that the elevated coercivities measured in the sample s are linked to the coupling of the core of the particles (alpha-Fe) with a highly disordered phase present in their surface region and whose behavior exhibits some similarities with a spin-glass phase. (C) 1999 Published by Elsevier Science B.V. All rights reserved.