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The synchrotron radiation facility ‘Solaris’ is currently being built in Krakow, Poland. The first experimental beamline at Solaris will use bending magnet radiation and two exchangeable end stations: a spectroscopic X-ray photoemission electron microscope and a soft X-ray absorption spectroscopy chamber. We present the beamline specifications and exemplary results obtained with our end station microscope, which (in statu nascendi of Solaris) has been operated at the NanoXAS beamline in the Swiss Light Source. The end stations should be available for a broad user community at Solaris in 2016. Copyright © 2015 John Wiley & Sons, Ltd.

Ultrathin Fe(001) films, of 1-3 atomic layers, were grown on the Au(001)-hex surface by molecular beam epitaxy. The film growth was controlled in situ by LEED and STM. At the initial stages of the iron growth, a monolayer of Au automatically diffuses onto the growing Fe film, preventing it from breaking up into islands. Conversion electron Mossbauer spectroscopy (CEMS) reveals considerable Au-Fe intermixing at the interface, which leads to formation of a two-dimensional alloy. The intermixing is also responsible for certain deterioration of the atomic order and the layer sequence in the artificial FeAu alloy obtained by alternative deposition of Fe(001) and Au(001) monolayers. CEMS data for single Fe films and Fe-Au monoatomic superlattices are compared and discussed basing on the FLAPW calculations using WIEN97 code.