(color online) Hysteresis loops of (a) Ti (20 nm)/NdFeB (100 nm)Nd (10 nm)/Ti (20 nm) SL film and (b)–(g) Ti (20 nm)/NdFeB (100 nm)Nd (10 nm)/Ta (x nm)/Fe (10 nm)/Ti (20 nm) nanocomposite films ((b) x = 0, (c) 2, (d) 10, (e) 50, (f) 250, and (g) 400). (h) The coercivity dependence of Ta thickness.^[25]