The first observation of the electron paramagnetic resonance of Fe in SiC crystals was reported. The Fe existed in a Fe3+ (3d5) charge state, with electron spin of 5/2, and appeared to occupy Si sites in the 6H-type lattice. The electron paramagnetic resonance spectrum of Fe3+ in SiC exhibited the characteristic anisotropy of a spin 5/2 system in a strong axial crystalline field with fine-structure parameter of 0.25/cm. The g-factor was almost isotropic, and was equal to 1.99.

Identification of Iron in 6H-SiC Crystals by Electron Paramagnetic Resonance. P.G.Baranov, I.V.Ilyin, E.N.Mokhov, V.A.Khramtsov: Semiconductor Science and Technology, 2001, 16[1], 39-43