Mössbauer studies in Fe(SiO2,BN) granular solids

Abstract Mossbauer spectroscopy has been used in Fe ( SiO 2 , BN ) granular solids in order to elucidate the large differences in their coercivity values. The Mossbauer data suggest a core/shell morphology for the Fe SiO 2 films with an Fe(Si) core surrounded by an FeSiO shell whose surface consists of Fe 2+ SiO particles. In Fe BN the data indicate the presence of amorphous FeB particles in a BN matrix.