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Structure and magnetic properties of Fe-Pd silica composites prepared by sequential ion implantation

TitleStructure and magnetic properties of Fe-Pd silica composites prepared by sequential ion implantation
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2004
AuthorsC. Fernández, de Julián, Mattei G., Sangregorio C., Tagliente M.A., Bello V., Battaglin G., Sada C., Tapfer Leander, Gatteschi D., and Mazzoldi P.
JournalJournal of Non-Crystalline Solids
Volume345-346
Pagination681-684
ISSN00223093
KeywordsCoercive fields, Coercive force, Composite materials, Granular films, Granular materials, Hysteresis, Ion implantation, Magnetic moments, Molecular Structure, Sequential ion implantation, Silica, Temperature thresholds
Abstract

The nanostructural and magnetic properties of Fe-Pd/SiO2 granular solids prepared by sequential ion implantation have been investigated. Nanostructural features depend on the relative Pd/Fe implanted dose and, in particular, in the Pd50Fe50 sample 2-6 nm size nanoparticles with the disordered FCC structure are formed. At low temperatures Fe-Pd composites have open hysteresis loops with coercivity fields of some mT and large magnetic moment per Fe atom (2.8 μB). In only-Fe and Fe-Pd composites the nanoparticles are superparamagnetic at room temperature and the blocking temperature increases from 20 K, for the only-Fe sample, to 110 K, for Fe50Pd50 sample. © 2004 Elsevier B.V. All rights reserved.

Notes

cited By 4; Conference of Physics of Non-Crystalline Solids 10 ; Conference Date: 15 October 2004 Through 15 October 2004; Conference Code:63887

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-9544238128&doi=10.1016%2fj.jnoncrysol.2004.08.158&partnerID=40&md5=73a8ed82d13ee67e02b8352a58c9edde
DOI10.1016/j.jnoncrysol.2004.08.158
Citation KeyDeJuliánFernández2004681