Probing the magnetic structure of Co$_{\mathrm{2}}$Fe$_{\mathrm{x}}$Mn$_{\mathrm{1-x}}$Si thin films by XAS/XMCD

We have analyzed the magnetic configuration for highly ordered epitaxial thin films across the Co$_{\mathrm{2}}$Fe$_{\mathrm{x}}$Mn$_{\mathrm{1-x}}$Si compositional series (x $=$ 0, 0.3, 0.7, 1) by x-ray circular magnetic dichroism (XMCD) and x-ray absorption spectroscopy (XAS). These measurements give the element-specific electronic structure of each film, as well as the spin and orbital moments. We will present our observations at the Co, Mn, and Fe L-edges to explain the significant changes in intermediate stoichiometries as compared with the parent Co$_{\mathrm{2}}$MnSi and Co$_{\mathrm{2}}$FeSi systems.