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Structural and magnetic properties of Fe-Al silica composites prepared by sequential ion implantation

TitoloStructural and magnetic properties of Fe-Al silica composites prepared by sequential ion implantation
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2004
AutoriC. Fernández, de Julián, Tagliente M.A., Mattei G., Sada C., Bello V., Maurizio C., Battaglin G., Sangregorio C., Gatteschi D., Tapfer Leander, and Mazzoldi P.
RivistaNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume216
Paginazione245-250
ISSN0168583X
Parole chiaveAluminum alloys, Crystal lattices, Fe-Al alloys, Ferromagnetism, Granular materials, Ion implantation, Iron alloys, Magnetic nanoparticles, Magnetization, Magnetometers, Rutherford backscattering spectroscopy, Silica, Silica composites, SQUIDs, Superparamagnetism, Transmission electron microscopy, X ray diffraction analysis
Abstract

The nanostructural and magnetic properties of Fe-Al/SiO2 granular solids prepared by ion implantation have been investigated. A strong effect of the implantation order of the Fe and Al ions has been evidenced. By implanting first the Al ions and later Fe ions, 5-40 nm core-shell nanoparticles are formed with a magnetic behavior similar to that of Fe. The lattice parameter of the nanoparticles is consistent with that of the α-Fe. By changing the implantation order, 10-15 nm core-shell nanoparticles of a bcc Fe-based phase with a lattice 2.5% smaller than that of α-Fe are formed. The temperature dependence of the magnetization indicates a superparamagnetic behavior. © 2003 Elsevier B.V. All rights reserved.

Note

cited By 22; Conference of Proceedings of the E-MRS 2003 Symposium E on Ion Beams ; Conference Date: 10 June 2003 Through 13 June 2003; Conference Code:62257

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-1042286914&doi=10.1016%2fj.nimb.2003.11.041&partnerID=40&md5=c7b08ce8b7ba457240d6d6a353633c89
DOI10.1016/j.nimb.2003.11.041
Citation KeyDeJuliánFernández2004245