Abstract
We have employed a new experimental configuration to measure ferromagnetic
X-ray resonance exchange scattering (XRES) from a EuS single crystal.
Using polarisation analysis we could achieve a magnetic-scattering intensity
stronger than charge scattering resulting in an asymmetry ratio as large as
Ra = 0.67 at the EuLII edge.
By a combined refinement of the dependencies of
the scattered intensity on the energy and the applied magnetic field we could
uniquely determine spectroscopic information such as the 5d conduction band
exchange splitting 
= 0.27(1) eV.