HARD AND SOFT X-MCD STUDIES OF CRO2

Chromium dioxide is investigated by X-MCD measurements on the Cr L-2/3 , CT K-edges and on the O K-edge in combination with Ligand Field Mult iplet Model (LFM) calculations and Linearized Augmented Plane Wave (LA PW) band-structure calculations. Applying so called Sum Rules [2, 3] t o the Cr L-2/3-edges one deduces an upper limit for the orbital-moment of 10(-2)mu(B) which is in good agreement with magneto-meter-measurem ents. Both Cr K-edge and O K-edge X-MCD measurements reflect a signifi cant polarization of the p-like bands and are well described by a spin -density calculation.