Magnetic properties of Fe xPt yAu 100-x-y nanoparticles

Vikas Nandwana, Girija S. Chaubey, Yunpeng Zhang, J. Ping Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Fe xPt yAu 100-x-y nanoparticles of size 3.5 nm were prepared by polyol reduction of platinum acetylacetonate and gold acetate and the thermal decomposition of iron pentacarbonyl. The as-synthesized nanoparticles with disordered fee structure were then heat treated to transform to the L1 0 structure with high magnetocrystalline anisotropy. By tuning the stoichiometry of the Fe xPt yAu 100-x-y nanoparticles, the phase transition temperature was reduced by more than 200°C. After the annealing 500 °C, for instance, the highest coercivity of 18 kOe was obtained from the Fe 51Pt 36Au 13 nanoparticles which is substantially higher compared to 2 kOe for Fe 51Pt 49 nanoparticles annealed at the same temperature. In addition to the high coercivity, the saturation magnetization value obtained from Fe 51Pt 36Au 13 nanoparticles was 47 emu/g which is similar to that for the Fe 51Pt 49 nanoparticles, indicating that there is no trade-off between the coercivity and the saturation magnetization upon Au doping.

Original languageEnglish (US)
Pages (from-to)2979-2983
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Issue number5
StatePublished - May 2010
Externally publishedYes


  • Biomedical applications
  • Chemical synthesis
  • Data storage
  • Nanoparticles
  • Permanent magnets

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics


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