Laser synthesis and magnetism of amorphous iron and cobalt carbide nanoparticles with carbon onion

Seung H. Huh; Atsushi Nakajima

doi:10.1063/1.2174116

Laser synthesis and magnetism of amorphous iron and cobalt carbide nanoparticles with carbon onion

Seung H. Huh, Atsushi Nakajima

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Amorphous iron or cobalt carbide nanoparticles with a carbon onion structure were produced using a pulsed laser ablation of metallocene powders at room temperature. While they are ferromagnetic at room temperature, they exhibit a drastic change in magnetic spin moments at 20-30 K. These magnetic properties are ascribed to a considerable magnetic contribution of superparamagnetism for the amorphous iron or cobalt carbide nanoparticles with a carbon onion and the origin of the magnetic properties is discussed.

Original language	English
Article number	064302
Journal	Journal of Applied Physics
Volume	99
Issue number	6
DOIs	https://doi.org/10.1063/1.2174116
Publication status	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Laser synthesis and magnetism of amorphous iron and cobalt carbide nanoparticles with carbon onion",

abstract = "Amorphous iron or cobalt carbide nanoparticles with a carbon onion structure were produced using a pulsed laser ablation of metallocene powders at room temperature. While they are ferromagnetic at room temperature, they exhibit a drastic change in magnetic spin moments at 20-30 K. These magnetic properties are ascribed to a considerable magnetic contribution of superparamagnetism for the amorphous iron or cobalt carbide nanoparticles with a carbon onion and the origin of the magnetic properties is discussed.",

author = "Huh, {Seung H.} and Atsushi Nakajima",

note = "Funding Information: We thank the KEIO Center Facilities for Science and Technology Research (CFSTR) for grateful technical support of TEM, XRD, and EPMA. This work is partly supported by a Grant-in-Aid for the 21st Century COE program “KEIO LCC” and for Scientific Research (C) (No. 15550129) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT).",

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AU - Huh, Seung H.

AU - Nakajima, Atsushi

N1 - Funding Information: We thank the KEIO Center Facilities for Science and Technology Research (CFSTR) for grateful technical support of TEM, XRD, and EPMA. This work is partly supported by a Grant-in-Aid for the 21st Century COE program “KEIO LCC” and for Scientific Research (C) (No. 15550129) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT).

PY - 2006

Y1 - 2006

N2 - Amorphous iron or cobalt carbide nanoparticles with a carbon onion structure were produced using a pulsed laser ablation of metallocene powders at room temperature. While they are ferromagnetic at room temperature, they exhibit a drastic change in magnetic spin moments at 20-30 K. These magnetic properties are ascribed to a considerable magnetic contribution of superparamagnetism for the amorphous iron or cobalt carbide nanoparticles with a carbon onion and the origin of the magnetic properties is discussed.

AB - Amorphous iron or cobalt carbide nanoparticles with a carbon onion structure were produced using a pulsed laser ablation of metallocene powders at room temperature. While they are ferromagnetic at room temperature, they exhibit a drastic change in magnetic spin moments at 20-30 K. These magnetic properties are ascribed to a considerable magnetic contribution of superparamagnetism for the amorphous iron or cobalt carbide nanoparticles with a carbon onion and the origin of the magnetic properties is discussed.

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Laser synthesis and magnetism of amorphous iron and cobalt carbide nanoparticles with carbon onion

Abstract

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