Au/Fe/Au/Si3N4 multilayers have been prepared in order to improve ferromagnetism in Fe/Si3N4 system A huge enhancement of magnetization is observed when the iron layers are embedded into gold ones showing saturation magnetization values near the bulk ones In this paper a careful microstructural study has been carried out to explain the observed magnetic behaviour of this ferromagnetic system prepared in the transparent silicon nitride matrix (C) 2010 Elsevier B V All rights reserved