We investigate the electronic properties of epitaxial Co₂(FeₓMn_1-x)Si, Co₂Fe(Al_1-xSiₓ), and Co₂(Cr0.6Fe0.4)Al films on MgO(100) substrates using circular dichroism in x-ray absorption spectroscopy (XMCD). Considering final-state electron correlations, the spin-resolved partial density of states at the Co atom can be extracted from XMCD data. The experimental results corroborate the predicted half-metallic ferromagnetic properties of these alloys and reveal a compositional dependence of the Fermi energy position within the minority band gap.
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Kallmayer et al. (2009) studied this question.
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