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.

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Magnetic Compton profiles (MCPs) of Ni and Fe along the [111] direction have been calculated using a combined density functional and many-body theory approach. At the level of the local spin density approximation, the theoretical MCPs do not describe correctly the experimental results around the zero momentum transfer. In this work, we demonstrate that inclusion of electronic correlations as captured by dynamical mean-field theory (DMFT) improves significantly the agreement between the theoretical and the experimental MCPs. In particular, an energy decomposition of Ni MCPs gives an indication of spin polarization and the intrinsic nature of the Ni 6 eV satellite, a genuine many-body feature.

The total and magnetically resolved Compton profiles are analyzed within the combined density

An investigation on the electronic and magnetic properties of NiAs-type CrTe and CrSe has been performed for ferromagnetic, antiferromagnetic and non-collinear spin configurations, using the spin-polarized relativistic KKR (Korringa-Kohn-Rostoker) band structure method. Calculated exchange coupling parameters, as well as the total energy calculated as a function of the tilt angle of magnetic moments, indicate the presence of a non-collinear spin structure in CrTe and CrSe. The existence of a non-collinear spin structure is also shown by Monte Carlo (MC) simulations used for studies on the temperature dependent magnetization. The results are compared with available results in the literature and are in satisfactory agreement with the experimental results.