X-ray magnetic circular dichroism using x-ray phase retarders in the hard x-ray region

Abstract

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Competing effects in the magnetic polarization of non-magnetic atoms

“…This amplitude reduction cannot only be accounted for in terms of the dilution of the Fe sublattice since it does not vary linearly with the Fe content (as will be shown in the inset to figure 5(b)). Indeed, the substitution of Fe by Al induces magnetic disorder in the 3d magnetic sublattice as well as modification of the electronic structure, as confirmed by magnetization and XAS measurements [33,34]. Consequently, the observed decrease of the XMCD Fe contribution can be ascribed to the reduction of the Ho(5d)-Fe(3d) hybridization associated with the modification of the magnetic properties of the 3d magnetic sublattice.…”

“…These magnetization measurements confirm the results obtained from XAS studies performed on the Ho 1−x Lu x (Fe 1−y Al y ) 2 series. The substitution of the rare-earth by Lu acts as a simple magnetic dilution effect whereas the Fe-Al substitution leads to a decrease of the R(5d)-Fe(3d) hybridization and induces magnetic disorder into the Fe sublattice [33,34].…”