Magnetic properties and microstructure of FePtB, FePt(B-Ag) granular films

► The (Fe-Pt)100−xBx (x=5, 10) film shows perpendicular magnetization. ► The (Fe-Pt)100−xBx (x=5, 10) film shows granular structure. ► The grains size of (Fe-Pt)100−xBx (x=5, 10) film is 20 and 15 nm, respectively. ► The grains size of (Fe-Pt)95(B0.9Ag0.1)5 granular film is 6.7 nm.