Multielectron excitations probed by helicity-modulation XMCD at K-edge in 3d transition metal compounds

Multielectron excitations (MEE) have been investigated using Xray magnetic circular dichroism (XMCD) at the K-edge in 3d transition metal compounds. I n the range of 50-70 eV above the absorption edge, a dichroic signal that i s associated with MEE was identified. This phenomenon is thought to occur d ue to the super Coster-Kronig transition described as the final states (1s) (1)(3p)(5)(3d)(n+2) resulting from the 3p --> 3d transitions. In order to v erify this interpretation, XMCD measurements using the helicity-modulation method and calculations of the dichroic spectrum were performed based on th is super Coster-Kronig transition.