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

C. De Julián Fernández, G. Mattei, C. Sangregorio, M.A. Tagliente, V. Bello, G. Battaglin, C. Sada, L. Tapfer, D. Gatteschi, P. Mazzoldi

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Abstract

The nanostructural and magnetic properties of Fe-Pd/SiO2granular solids prepared by sequential ion implantation have been investigated. Nanostructural features depend on the relative Pd/Fe implanted dose and, in particular, in the Pd50Fe50sample 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 Fe50Pd50sample. © 2004 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)681 - 684
Number of pages4
JournalJournal of Non-Crystalline Solids
Volume345-346
DOIs
Publication statusPublished - 15 Oct 2004
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

De Julián Fernández, C., Mattei, G., Sangregorio, C., Tagliente, M. A., Bello, V., Battaglin, G., ... Mazzoldi, P. (2004). Structure and magnetic properties of Fe-Pd silica composites prepared by sequential ion implantation. Journal of Non-Crystalline Solids, 345-346, 681 - 684. https://doi.org/10.1016/j.jnoncrysol.2004.08.158