Synthesis and magnetic properties of multifunctional CoPtAu nanoparticles

Ji Hyun Min, Jun Hua Wu, Ah Young Song, In Tak Jeon, Jae Seon Ju, Young Keun Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We present the synthesis and magnetic properties of multifunctional CoPtAu alloy nanoparticles of three compositions, Co0.33 Pt0.33 Au0.33, Co0.2 Pt0.2 Au0.6, and Co0.4 Pt0.4 Au0.2, by a modified polyol process. The x-ray diffraction and transmission electron microscopy analyses confirm the formation of the alloy nanostructure comprising Au-rich and Pt-rich nanophases, with a narrow distribution of particle sizes and provides the detailed structural arrangements. The magnetic study shows the composition dependence of the magnetic properties of the nanoparticles, from superparamagnetic for both Co0.33 Pt0.33 Au0.33 and Co0.4 Pt0.4 Au0.2 to soft ferromagnetic for Co0.2 Pt0.2 Au0.6.

Original languageEnglish
Article number07B527
JournalJournal of Applied Physics
Volume105
Issue number7
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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