Magnetization reversal, asymmetry, and role of uncompensated spins in perpendicular exchange-coupled systems, Camarero, J., Miguel, J., Goedkoop, J., Vogel, J., Romanens, F., Pizzini, S., Garcia, F., Sort, J., Dieny, B., Brookes, N.B., Applied Physics Letters, 89, 232507 (2006)