(color online) Variation of δm(H) as the function of applied field for the thin film Mo (50 nm)/NdFeB (800 nm)/Cu (6 nm)/Fe (22 nm)/Cu (6 nm)/NdFeB (800 nm)/Mo (50 nm) (dark) and Mo (50 nm)/NdFeB (800 nm)/Cr (6 nm)/Fe (21 nm)/Cr (6 nm)/NdFeB (800 nm)/Mo (50 nm) (red) measured along the direction perpendicular to the film plane.^[20]