Granular Fe metal films consisting of ultrafine Fe granules imbedded in a SiO2 matrix have been fabricated. The granular microstructure has been revealed by transmission electron microscopy (TEM). Electron diffraction indicates that the Fe granules are bcc α-Fe and the SiO2 matrix is amorphous. 57Fe Mössbauer spectroscopy indicates that there are no measurable traces of Fe oxides. The magnetic properties of the granular Fe films deviate from those of bulk Fe due to single domain effects.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics