Magnetic properties of Mn-doped cubic silicon carbide

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.