New experimental evidence for origin of ferromagnetism ordering in Fe-doped SiC

Fe-doped 6H–SiC polycrystalline powders were synthesized by solid-state reaction of high-purity silicon, graphite and iron powder. X-ray powder diffraction (XRD) and high-resolution transmission electron microscope (HRTEM) analysis showed the presence of little Fe 3Si as secondary phase. Temperature...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2008-08, Vol.403 (17), p.2897-2901
Main Authors: Song, B., Jian, J.K., Li, H., Lei, M., Bao, H.Q., Chen, X.L., Wang, G.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Diluted magnetic semiconductor
Exact sciences and technology
Fe-doping
Magnetic properties and materials
Nonmetallic ferromagnetic materials
Physics
SiC
Studies of specific magnetic materials
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Summary:Fe-doped 6H–SiC polycrystalline powders were synthesized by solid-state reaction of high-purity silicon, graphite and iron powder. X-ray powder diffraction (XRD) and high-resolution transmission electron microscope (HRTEM) analysis showed the presence of little Fe 3Si as secondary phase. Temperature-dependent magnetization showed two typical ferromagnetic (FM) transition temperatures located at 438 and 837 K, respectively. These features provided convincing experimental evidence to demonstrate that the presence of Fe 3Si is not the nature origin of FM ordering in Fe-doped SiC. It also indicated that trace of Fe-doping in SiC will induce a high-temperature FM arrangement.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2008.02.032