Abstract
Using polarized neutron reflectivity (PNR) measurements together with associated simulation, magnetic structures of two Ni 80 Fe 20 (1 1 1)/Ru (0 0 0 1) multilayer samples with Ru thickness of 9 and 21 Å were investigated under various external magnetic fields at room temperature. The results reveal the existence of layer thickness, interface roughness, magnetic moment, interlayer coupling angle and non-collinear coupling. The former three are independent of Ru thickness; while the latter two are strongly dependent of Ru thickness. © 2006 Elsevier B.V. All rights reserved.