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The influence of composition and porosity on the magnetic properties of FeCo–SiO2 nanocomposite aerogels

Casu, Alberto, Casula, Maria Francesca, Corrias, Anna, Falqui, Andrea, Loche, Danilo, Marras, Sergio, Sangregorio, Claudio (2008) The influence of composition and porosity on the magnetic properties of FeCo–SiO2 nanocomposite aerogels. Physical Chemistry Chemical Physics, 10 (7). pp. 1043-1052. ISSN 1463-9084. (doi:10.1039/b712719g) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1039/b712719g

Abstract

FeCo–SiO2 aerogel nanocomposites with different porosity were obtained using two different sol-gel procedures: the first involves a single acidic step and gives rise to relatively dense aerogels while the second procedure allows one to obtain highly porous aerogels using urea in the second step to promote fast gelation. Samples with different loading of FeCo equimolar alloy and with different Fe : Co ratios were prepared. The magnetic properties of all the nanocomposite aerogels were extensively studied as a function of porosity and composition. Particular attention was paid to the role played by the interparticle interactions, which are mediated by the silica matrix, in determining the collective magnetic behaviour. The kind and strength of magnetic interactions are affected by both the composition and the porosity of the matrix.

Item Type: Article
DOI/Identification number: 10.1039/b712719g
Subjects: Q Science
Q Science > QC Physics
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Anna Corrias
Date Deposited: 07 Mar 2014 00:05 UTC
Last Modified: 23 Jan 2020 04:08 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/40473 (The current URI for this page, for reference purposes)
Corrias, Anna: https://orcid.org/0000-0002-5190-8196
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