The essential difference in electronic structure and magnetic properties has been revealed in [Co0� 45Fe0� 45Zr0� 1/a-Si]N multilayers with different thicknesses of sublayers and repetition periods. Multilayers were investigated by the macroscopic magneto-optical transversal Kerr effect (TKE), structure sensitive low-angle X-ray reflectivity method, element-selective X-ray absorption spectroscopy (XANES) and X-ray magnetic circular dichroism (XMCD) at the Zr L2� 3 and K absorption edges of Fe and Co. The local probes of electronic and magnetic properties are fully consistent with macroscopic data in assumption of grain formation in initially ferromagnetic Co0� 45Fe0� 45Zr0� 1 sublayers. Different silicides and grains of Co0� 45Fe0� 45Zr0� 1 are created depending on sublayer thicknesses mostly in the interface regions with a-Si layer or spread across the whole Co0� 45Fe0� 45Zr0� 1 sublayer. These two models give a good explanation of the magneto-optical TKE effect enhancement and its huge reduction in the multilayer with larger and smaller sublayer thicknesses respectively.

The essential difference in electronic structure and magnetic properties has been revealed in [Co0� 45Fe0� 45Zr0� 1/a-Si]N multilayers with different thicknesses of sublayers and repetition periods. Multilayers were investigated by the macroscopic magneto-optical transversal Kerr effect (TKE), structure sensitive low-angle X-ray reflectivity method, element-selective X-ray absorption spectroscopy (XANES) and X-ray magnetic circular dichroism (XMCD) at the Zr L2� 3 and K absorption edges of Fe and Co. The local probes of electronic and magnetic properties are fully consistent with macroscopic data in assumption of grain formation in initially ferromagnetic Co0� 45Fe0� 45Zr0� 1 sublayers. Different silicides and grains of Co0� 45Fe0� 45Zr0� 1 are created depending on sublayer thicknesses mostly in the interface regions with a-Si layer or spread across the whole Co0� 45Fe0� 45Zr0� 1 sublayer. These two models give a good explanation of the magneto-optical TKE effect enhancement and its huge reduction in the multilayer with larger and smaller sublayer thicknesses respectively.

Delayed nuclear resonant reflectivity (NRR) of [W/Si]10 /Si(z nm)/Ag/57Fe/Ag/Si multilayer as well as the time spectra at several grazing angles have been measured at the nuclear resonance beamline ID18/ID22N of the ESRF. NRR of 57Fe layer has been enhanced by standing waves created by Bragg reflection from [W/Si]10 backing and by multiple reflections from Ag adjacent layers. Fitting of the data was done with the program package REFTIM. The reconstructed HFI depth distributions show an essential asymmetry of the 57Fe interfaces. The total 57Fe density depth-profiles turn out to be in a good agreement with the measured Fe Kα fluorescence curve.

An analysis of the influence of standing waves on the angular dependencies of the fluorescent yield from an ultrathin iron layer buried inside a multilayer structure of Nb(50 nm)/Fe(3.9 nm)/[Si/Mo(6.77 nm)] 40 /SiO 2 is presented. These angular dependencies of reflectivity and Fe K α -fluorescence yield were measured at the Station for high-precision X-ray optics (HPXO) of the Kurchatov Center for Synchrotron Radiation and Nanotechnology. The measured data was analyzed with the help of our FLUO software package. As a result of the complex treatment of reflectivity and Fe fluorescent yield data, the depth profile for iron atomic density was restored.