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O: Fachverband Oberflächenphysik

O 83: [MA] Focussed Session "X-ray absorption spectra - state of the art of theory and experiment" (jointly with DS, HL, MM, O)

O 83.2: Topical Talk

Donnerstag, 17. März 2011, 15:45–16:15, HSZ 403

Polarisation dependent X-ray spectroscopy — •Andrei Rogalev, Fabrice Wilhelm, and Jose Goulon — European Synchrotron Radiation Facility (E.S.R.F.), 6 rue Jules Horowitz, 38000 Grenoble, France

In these recent years X-ray spectroscopies have been undergoing a continuous expansion, as illustrated by the discovery of a variety of new experimental techniques associated with the exploitation of the polarisation properties of synchrotron radiation. The detection of X-ray magnetic linear and circular dichroism in ferro-, ferri- and paramagnetic systems, the discovery of X-ray natural circular dichroism in gyrotropic single crystals as well as the observation of non-reciprocal X-ray linear dichroism and X-ray magneto-chiral dichroism in magnetoelectric systems are particularly interesting. In combination with sum rules these element and orbital selective spectroscopies have proved to be remarkable tools to study fundamental properties of magnetic matter via various order parameters, e.g., spin and orbital moments, electric dipole moment, orbital anapole etc. In this talk we report on advanced instrumentation developed at the ESRF beam line ID12 which is dedicated to polarization dependent x-ray spectroscopy at photon energies above 2keV. Several examples have been selected to illustrate the present performances of the beam line and to show the recent advances in the field.