title: X-ray magnetic circular dichroism measured at the Fe K-edge with a reduced intrinsic broadening: x-ray absorption spectroscopy versus resonant inelastic x-ray scattering measurements.
abstract: X-ray magnetic circular dichroism is measured at the Fe K pre-edge in yttrium iron garnet using two different procedures that allow reducing the intrinsic broadening due to the 1s corehole lifetime. First, deconvolution of XMCD data measured in total fluorescence yield (TFY) with an extremely high signal-to-noise ratio enables a factor of 2.4 to be gained in the XMCD intensity. Ligand field multiplet calculations performed with different values of intrinsic broadening show that deconvolving such high quality XMCD data is similar to reducing the lifetime broadening from a 1s corehole to a 2p corehole. Second, MCD is measured by resonant inelastic x-ray scattering spectroscopy as a function of incident energy and emission energy. Selection of a fixed emission energy, instead of using the TFY, allows enhancing the MCD intensity up to a factor of  ∼4.7. However, this significantly changes the spectral shape of the XMCD signal, which cannot be interpreted any more as an absorption spectrum.
authors: Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Universités, UMR CNRS 7590, UPMC Univ Paris 06, Muséum National d'Histoire Naturelle, IRD UMR206, 4 Place Jussieu, F-75005 Paris, France.
authors: Amélie
authors: A
authors: Juhin
authors: Philippe
authors: P
authors: Sainctavit
authors: Katharina
authors: K
authors: Ollefs
authors: Marcin
authors: M
authors: Sikora
authors: Adriano
authors: A
authors: Filipponi
authors: Pieter
authors: P
authors: Glatzel
authors: Fabrice
authors: F
authors: Wilhelm
authors: Andrei
authors: A
authors: Rogalev