Journal
PHYSICA B-CONDENSED MATTER
Volume 394, Issue 1, Pages 122-126Publisher
ELSEVIER
DOI: 10.1016/j.physb.2007.02.028
Keywords
diluted magnetic semiconductors; Mn doping; cubic silicon carbide; ferromagnetism
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Bulk polycrystalline Si1-xMnxC (0 <= x <= 0.1) samples were prepared by the solid-state reaction method. Their structural and magnetic properties had been investigated. Powder X-ray diffraction analysis demonstrates that the appropriate Mn doping does not change the crystal structure of cubic silicon carbide (3C-SiC). Magnetic studies reveal that the ferromagnetism can be developed when Mn substitution is as low as x=0.01. The Curie temperature (T-C) increases monotonously with increasing Mn-doped content up to x=0.05, and then almost keeps constant as x further increases. The effective magnetic moments are 2.05 mu(B)/Mn, 1.19 mu(B)/Mn, 0.90 mu(B)/Mn, and 0.89 mu(B)/Mn for the samples with x = 0.01, 0.03, 0.05, and 0.1, respectively. (c) 2007 Elsevier B.V. All rights reserved.
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