Investigation of the systematics of CMXD at the L2,3 edges in (RE)2Co17

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Abstract
We have performed systematic investigations of the circular magnetic x‐ray dichroism, i.e., the spin‐dependent absorption of circularly polarized x rays at the L2,3 edges of the 4f elements in the compound (RE)2Co17. In all systems significant CMXD signals with relative large amplitudes of some percent have been found. It is expected, that the spin‐dependent absorption profile reflects the spin‐density of d‐like unoccupied states at the Fermi level and thus contains information on the orientation of the 4f moment. The ratio of the CMXD signal at the L2 and L3 edges depends strongly on the angular momentum of the 4f core and indicates in case of Ce2Co17, that the 4f electrons are of itinerant character with almost quenched angular momentum, as theoretically expected for similar Ce systems.

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