The magnetic moments in Ni/Pt multilayers are thoroughly studied by combining experimental and ab initio theoretical techniques. SQUID magnetometry probes the samples' magnetizations. X-ray magnetic circular dichroism separates the contribution of Ni and Pt and provides a layer-resolved magnetic moment profile for the whole system. The results are compared to band-structure calculations. Induced Pt magnetic moments localized mostly at the interface are revealed. No magnetically "dead" Ni layers are found. The magnetization per Ni volume is slightly enhanced compared to bulk NiPt alloys.

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Articles you may be interested inElectronic structure of Fe/MgO/Fe multilayer stack by X-ray magnetic circular dichroism J. Appl. Phys. 115, 17C109 (2014); 10.1063/1.4862380 X-ray absorption and magnetic circular dichroism of graphene/Ni (111) Application of the x-ray magnetic circular dichroism sum rules to Co/Pt multilayers (abstract) X-ray magnetic circular dichroism measurements have been performed on Ni/Pt multilayers at a temperature of 10 K. The element specificity and shell selectivity of the technique allows us to probe Ni and Pt magnetic moments and to separate them into their constituent spin ( S ) and orbital ( L ) magnetic moments. The Ni magnetic moment at the interface is found to be reduced. However, magnetically ''dead'' Ni layers are unambiguously ruled out. Induced Pt magnetic moments up to about 0.3 B /atom are reported. The results are compared to ab initio calculations and to previous experiments performed on NiPt alloys. The role of intermixing in the reduction of the Ni magnetic moments is also discussed.

State-of-the-art x-ray magnetic circular dichroism measurements of V at the L 2,3 edges with an excellent signal-to-noise ratio are analyzed for a Fe 0.9 V 0.1 disordered alloy and a Fe/V 3 /Fe(110) trilayer which were prepared in UHV and measured in situ on a Cu͑100͒ single crystal. The absorption fine structure and the magnetic dichroism are discussed in detail with the help of ab initio theory. Several approaches known from literature to obtain magnetic ground-state properties from experimental spectra are tested for their validity.