Effect of composition on L10 ordering, structural and magnetic properties of Fe100-xPtx alloy films prepared by controlled sputtering

•Fe100-xPtx alloy films are prepared by ion beam sputtering technique.•Composition was tuned by precise control of exposed area of Fe and Pt to ion beam.•Chemical composition films are confirmed via × ray fluorescence and reflectivity.•Degree and type of chemical ordering is revealed via grazing incidence XRD.