Abstract
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 language | English |
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Pages (from-to) | 2592-2594 |
Number of pages | 3 |
Journal | IEEE Transactions on Magnetics |
Volume | 38 |
Issue number | 5 I |
DOIs | |
State | Published - Sep 2002 |
Event | 2002 International Magnetics Conference (Intermag 2002) - Amsterdam, Netherlands Duration: 28 Apr 2002 → 2 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)
Funding
Manuscript received February 7, 2002; revised May 21, 2002. This work was supported by the Israeli Ministry of Science, Culture and Sports under Infrastructure Grant 1093. S. I. Nikitenko, Y. Koltypin, and A. Gedanken are with the Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel (e-mail: [email protected]). V. Markovich, E. Rozenberg, and G. Gorodetsky are with the Department of Physics, Ben-Gurion University, 84105 Beer-Sheva, Israel. Digital Object Identifier 10.1109/TMAG.2002.803222.
Funders | Funder number |
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Ministry of Culture and Sport | 1093 |
Keywords
- Fe
- Fe C
- Magnetic nanoparticles
- Time stability