Evidence of Multielectron Excitations in Magnetic Circular X-ray Dichroism of Rare Earth Compounds

This letter reports the first experimental evidence of multielectron excitations in magnetic circular x-ray dichroism (MCXD) spectra, measured at the LI,II,III-edges of Rare Earths (RE) in several RE-Transition Metal (Fe, Co) compounds. These multielectron features involve transitions from the 2p and 4d levels and exhibit a very strong magnetic enhancement compared to normal MCXD.