From core/shell structured FePt/Fe3O4/MgO to ferromagnetic FePt nanoparticles

Jaemin Kim, Chuanbing Rong, Youngmin Lee, J. Ping Liu, Shouheng Sun

Research output: Contribution to journalArticle

Abstract

This paper reports an improved synthesis of hard magnetic fct-FePt nanoparticles (NPs) from reductive annealing of fcc-FePt/Fe3O 4/MgO NPs followed by MgO removal. The fcc-FePt/Fe3O 4 NPs are made by a one-pot reaction of Pt(acac)2 with Fe(CO)5 in the presence of oleic acid and oleylamine and are coated with a layer of MgO via the thermal decomposition of Mg(acac)2. The MgO coating prevents FePt from sintering under high temperature reductive annealing conditions. The fct-FePt NPs obtained from the 650°C annealing of the fcc-FePt/Fe3O4/MgO NPs show a coercivity value of 2 T at 300 K, suitable for various nanomagnetic applications.

Original languageEnglish (US)
Pages (from-to)7242-7245
Number of pages4
JournalChemistry of Materials
Volume20
Issue number23
DOIs
StatePublished - Dec 9 2008
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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