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Iron impurities on interstitial (Fe i) and substitutional sites (Fe S) in SiC have been detected by 57 Fe emission Mössbauer spectroscopy following implantation of radioactive 57 Mn+ parent ions. At temperatures< 900 K two Fe i species are found, assigned to quasi-tetrahedral interstitial sites surrounded by, respectively, four C (Fe i, C) or Si atoms (Fe i, Si). Above 900 K, the Fe i, Si site is proposed to “transform” into the Fe i, C site by a single Fe i jump during the lifetime of the Mössbauer state (T 1/2= 100 ns). Fe i, C and substitutional Fe S sites are stable up to> 1,070 K.
Kluwer Academic Publishers
Publication date: 
1 Apr 2006

Haraldur Pall Gunnlaugsson, K Bharuth-Ram, M Dietrich, M Fanciulli, Hans Otto Uldall Fynbo, G Weyer

Biblio References: 
Volume: 169 Issue: 1-3 Pages: 1319-1323
Hyperfine interactions