Magnetic circular dichroism in Fe 2 p resonant photoemission of magnetite

摘要: Measurements of magnetic circular dichroism in Fe $2p$ resonant photoemission and calculations based on a full-multiplet cluster model reveal the parameters electronic structure ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}.$ We obtained on-site Coulomb energy ${U}_{\mathrm{dd}}$ $3d$ electrons, charge-transfer $\ensuremath{\Delta}$ which is defined as required to transfer an electron from O $3d,$ hybridization strength between at different ion sites ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ by analyzing data dichroism. The ${\mathrm{Fe}}^{3+}$ ions was found be significantly smaller than that ${\mathrm{Fe}}^{2+}$ ions. determined positions low-lying multiplets each site. These for are 1.5\char21{}2.5 eV higher those band-structure calculations. Our also show spectral weight binding bigger 10 substantial, contrast results findings conclude system with strong electron-electron interactions.