Effect of nucleation and growth dynamics on saturation magnetization of chemically synthesized Fe nanoparticles

T. Ogawa, K. Seto, D. Hasegawa, H. T. Yang, H. Kura, M. Doi, M. Takahashi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In order to obtain mono-dispersed Fe NPs with high saturation magnetization, quantitative analysis method to investigate the growth dynamics of the Fe NPs synthesized by a conventional thermal decomposition method has been developed. As a result, fast nucleation process promotes formation of ~4 nm of initial nucleus with a non-equilibrium phase, resulting in low saturation magnetization. And slow particle growth with atomic-scaled surface precipitation mode (< 100 atoms/(min·nm2)) can form the growth layer on the surface of initial nucleus with high saturation magnetization (~190 emu/gFe) as an equilibrium a phase of Fe. Therefore, higher stabilization of small initial nucleus generated just after the injection of Fe(CO)5 should be one of the key issues to achieve much higher Ms of Fe NPs.

Original languageEnglish
Pages (from-to)308-311
Number of pages4
JournalJournal of Magnetics
Volume16
Issue number3
DOIs
Publication statusPublished - 2011 Sep 1

Keywords

  • Chemical synthesis
  • Fe nanoparticles
  • Formation dynamics
  • Saturation magnetization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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