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 samples 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.
Mossbauer analysis of the phase distribution present in nanoparticulate Fe/SiO2 samples
de Julian C;
1999
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 samples 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.File in questo prodotto:
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