STUDY OF ORBITAL AND SPIN MAGNETIZATION DENSITIES IN MAGNETIC MATERIALS. Gerhard Grübel, European Synchrotron Radiation Facility, 38043 Grenoble, France

The element specific determination of orbital and spin magnetization densities remains a challenging task which is adressed experimentally by both magnetic x-ray scattering (XMS) and x-ray magnetic circular dichroism (XCMD). XMS experiments performed at high brilliance synchrotron radiation sources allow a quantitative polarization analysis of the magnetic scattering cross-section in both the resonant and non-resonant regimes. This permits the determination of orbital- and spin magnetization densities either via the polarization dependence of the non-resonant cross-section or through the application of magneto-optical sum rules to the dipolar contributions of the resonant magnetic cross-section obtained at two absorption edges. The same sum rules allow to deduce element-specific orbital and spin magnetic moments from x-ray absorption spectroscopy (XAS) and its associated magnetic circular dichroism data.