W and Ag induced magnetization profile in multilayer with 3d metals

In this paper, the capability of X-ray resonant magnetic scattering (XRMS) associated with X-ray magnetic circular dichroism (XMCD) to give experimental information on the effective exchange interaction between two ferromagnetic layers across a non-magnetic (4d or 5d) spacer is presented. In particular, XRMS across the W L₁ absorption edge in combination with XMCD and anomalous X-ray reflectivity to obtain the magnetic polarization profile of the Fe/W multilayer are used. X-ray absorption and resonant scattering spectroscopies at the Ag L_2,3 edges are combined in order to obtain a complete picture of Ag induced magnetic properties in the NiFe/Ag multilayer. From XMCD analysis, the total magnetic moment of W is found to be μ_tot = -0.038μ_B/atom while for Ag, the total magnetic moment is 0.004μ_B/atom. The experimental results are compared with recent band structure calculations to get more insight on the mechanism governing this exchange interaction.