57Fe Mossbauer study of FePtN films prepared by reactive sputtering

Abstract

The FePt film prepared by ion beam sputtering with nitrogen gas in addition to the Ar gas transforms into the ordered fct structure at a faster rate as compared to that film prepared only with Ar gas. Mossbauer studies, X-ray reflectivity (XRR), and X-ray diffraction (XRD) characterization shows that at high temperature annealing, the present nitrogen escapes creating voids which play a significant role in the transformation of disordered FePt into the ordered FePt structure.