Strong K-edge Magnetic Circular Dichroism Observed in Photon-in-Photon-out Spectroscopy

Marcin Sikora*, Amelie Juhin, Tsu-Chien Weng, Philippe Sainctavit, Carsten Detlefs, Frank de Groot, Pieter Glatzel

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

A large enhancement of the x-ray magnetic circular dichroism is observed at the iron K absorption preedge of magnetite. This is achieved by performing resonant inelastic x-ray scattering (RIXS) experiments with a 2p hole in the final state of the second-order optical process. We measured and calculated the full 1s2p RIXS planes for opposite helicities of the incoming circularly polarized x rays. The crystal field multiplet calculations show that the enhancement arises from 2p-3d Coulomb repulsions and 2p and 3d spin-orbit coupling. The observed magnitude of the RIXS magnetic circular dichroism effect is similar to 16%. This opens up new opportunities for a broad range of research fields allowing for truly bulk-sensitive, element-, and site-selective measurements of 3d transition metal magnetic moments and their ordering using hard x-ray photons.

Original languageEnglish
Article number037202
Number of pages4
JournalPhysical Review Letters
Volume105
Issue number3
DOIs
Publication statusPublished - 13 Jul 2010

Funding

We acknowledge ESRF for the provision of beam time. We thank C. Brouder for discussion of the theoretical results, A. Rogalev and F. Wilhem for discussion on the correct sign of XMCD, and the ID26 staff for help in setting up the experiment. M. S. acknowledges financial support from the Polish Ministry of Science and Higher Education. A.J. and F.d.G. acknowledge financial support from the Netherlands National Science Foundation (NWO/VICI program).

Keywords

  • RESONANT RAMAN-SCATTERING
  • X-RAY-ABSORPTION
  • LOWER MANTLE
  • EMISSION
  • IRON
  • PEROVSKITE
  • COMPLEXES
  • SPECTRA
  • EARTHS
  • XMCD

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