Charge-magnetic roughness correlations in an Fe/Gd multilayer

Charge-magnetic roughness correlations of the Gd layers in an Fe/Gd multila yer are studied using diffuse, x-ray resonant magnetic scattering. The stro ng interfacial coupling exhibited by this system, which restricts the orien tation of the magnetic moments, makes possible a detailed study of the intr insic charge-magnetic roughness. Quantitative analysis of the data is carri ed out by using a newly developed model, based on the Born approximation, f or diffuse, x-ray resonant magnetic scattering from-multilayers, Fits to th e charge and charge-magnetic interference data result in longer correlation lengths for both in-plane and out-of-plane charge-magnetic roughness than for charge roughness. [S0163-1829(99)10241-8].