(color online) Hysteresis loops of MgO/Cr (20 nm)/Sm(Co_0.9Cu_0.1)₅ (50 nm)/Fe₂Co (x nm)/Cr (20 nm) films with c-axis in-plane (IP) geometry (x = 3 (a), 5 (b), 8 (c), and 10 (d)) and Al₂O₃/Ru (20 nm)/Sm(Co_0.9Cu_0.1)₅(50 nm)/Fe₂Co (x nm)/Ru (20 nm) films with c-axis out-of-plane (OOP) geometry (x = 3 (e), 5 (f), 8 (g), and 10 (h)).^[81]