Experimental application of sum rules for electron energy loss magnetic chiral dichroism

Lionel Calmels (1) , Florent Houdellier (1) , Bénédicte Warot-Fonrose (1) , Christophe Gatel (1) , Martin Hÿtch (1) , Virginie Serin (1) , Etienne Snoeck (1) , P. Schattschneider (2)

1 CEMES - Centre d'élaboration de matériaux et d'études structurales
2 Institute for Solid State Physics

We present a derivation of the orbital and spin sum rules for magnetic circular dichroic spectra measured by electron energy loss spectroscopy in a transmission electron microscope. These sum rules are obtained from the differential cross section calculated for symmetric positions in the diffraction pattern. Orbital and spin magnetic moments are expressed explicitly in terms of experimental spectra and dynamical diffraction coefficients. We estimate the ratio of spin to orbital magnetic moments and discuss first experimental results for the Fe L2,3 edge.

Domaines: Optique [physics.optics]; Physique des Hautes Energies - Expérience [hep-ex]; Physique Quantique [quant-ph]; Physique des accélérateurs [physics.acc-ph]; Electromagnétisme; Matériaux; Optique / photonique; Traitement du signal et de l'image [eess.SP]

Lionel Calmels, Florent Houdellier, Bénédicte Warot-Fonrose, Christophe Gatel, Martin Hÿtch, et al.. Experimental application of sum rules for electron energy loss magnetic chiral dichroism. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2007, 76 (6), ⟨10.1103/PhysRevB.76.060409⟩. ⟨hal-01741982⟩