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

doi:10.1109/tmag.2002.803222

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

Department of Chemistry

Research output: Contribution to journal › Conference article › peer-review

13 Scopus citations

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
Pages (from-to)	2592-2594
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	38
Issue number	5 I
DOIs	https://doi.org/10.1109/tmag.2002.803222
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
Ministry of Culture and Sport	1093

Keywords

Fe
Fe C
Magnetic nanoparticles
Time stability

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10.1109/tmag.2002.803222

Cite this

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title = "Synthesis of air-stable iron-iron carbide nanocrystalline particles showing very high saturation magnetization",

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.",

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author = "Nikitenko, {Sergey I.} and Yuri Koltypin and Vladimir Markovich and Evgeny Rozenberg and Gad Gorodetsky and Aharon Gedanken",

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); 2002 International Magnetics Conference (Intermag 2002) ; Conference date: 28-04-2002 Through 02-05-2002",

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AU - Nikitenko, Sergey I.

AU - Koltypin, Yuri

AU - Markovich, Vladimir

AU - Rozenberg, Evgeny

AU - Gorodetsky, Gad

AU - Gedanken, Aharon

N1 - 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)

PY - 2002/9

Y1 - 2002/9

N2 - 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.

AB - 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.

KW - Fe

KW - Fe C

KW - Magnetic nanoparticles

KW - Time stability

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JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 5 I

T2 - 2002 International Magnetics Conference (Intermag 2002)

Y2 - 28 April 2002 through 2 May 2002

ER -

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

Abstract

Bibliographical note

Funding

Keywords

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