Synthesis of air-stable iron-iron carbide nanocrystalline particles showing very high saturation magnetization

Sergey I. Nikitenko, Yuri Koltypin, Vladimir Markovich, Evgeny Rozenberg, Gad Gorodetsky, Aharon Gedanken

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Initial results on synthesis, magnetic properties and time stability of iron-iron carbide nanoparticles are presented. It is shown that as-prepared (after sonochemical synthesis in solution) material consists of small iron particles (d < 10 nm) embedded in a polymeric matrix. It was found to be super-paramagnetic. Consequent thermal annealing of as-prepared material at temperatures up to 1073 K in argon results, first, in the growth of the iron particles up to 150 nm. Second, the obtained powders become ferromagnetic. Third, such powders are air-stable due to the formation of an interracial iron carbide layer during annealing. The air-stability of the iron-iron carbide powder was tested by time dependence measurements of its resistivity.

Original languageEnglish
Pages (from-to)2592-2594
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5 I
StatePublished - Sep 2002
Event2002 International Magnetics Conference (Intermag 2002) - Amsterdam, Netherlands
Duration: 28 Apr 20022 May 2002

Bibliographical note

Funding Information:
The work was done with the financial support from a collaborative project with Central Council for Research in Homeopathy (CCRH), Under Ministry of AYUSH, Govt. of India (F. No. 6-01/14-15/CCRH/cash/11515)


  • Fe
  • Fe C
  • Magnetic nanoparticles
  • Time stability


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