Synthesis of magnetic CoPt/SiO2 nano-composite by pulsed laser ablation

Takafumi Seto, Kenji Koga, Fumiyoshi Takano, Hiroyuki Akinaga, Takaaki Orii, Makoto Hirasawa, Mitsuhiro Murayama

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Core-shell nanoparticles composed of ferromagnetic cobalt platinum cores covered by non-magnetic silica shells were synthesized by laser ablation of a composite target in a helium background gas. The average diameter of the CoPt core was controlled by adjusting the CoPt/SiO2 ratio of the ablation target and size-classifying the nanoparticles by an electrical mobility classifier. The present method successfully synthesized nearly monodispersed nanoparticles with an average core diameter as small as 2 nm. The size-dependent magnetic properties of nano-composite films generated by the deposition of nanoparticles onto the substrate were investigated by a SQUID magnetometer.

Original languageEnglish
Pages (from-to)342-345
Number of pages4
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume182
Issue number3
DOIs
Publication statusPublished - Sep 10 2006
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

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