Magnetic properties of permalloy multilayers with alternating perpendicular anisotropies M. Maicas, R. Ranchal, C. Aroca, P. Sánchez and E. López Eur. Phys. J. B, 62 3 (2008) 267-270 Published online: 19 April 2008 DOI: 10.1140/epjb/e2008-00163-4