Large magnetic circular dichroism in resonant inelastic x-ray scattering at the Mn L -edge of Mn-Zn ferrite

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Abstract

We report resonant inelastic x-ray scattering (RIXS) excited by circularly polarized x-rays on Mn-Zn ferrite at the Mn L2,3-resonances. We demonstrate that crystal field excitations, as expected for localized systems, dominate the RIXS spectra and thus their dichroic asymmetry cannot be interpreted in terms of spin-resolved partial density of states, which has been the standard approach for RIXS dichroism. We observe large dichroic RIXS at the L2-resonance which we attribute to the absence of metallic core hole screening in the insulating Mn-ferrite. On the other hand, reduced L3-RIXS dichroism is interpreted as an effect of longer scattering time that enables spin-lattice core hole relaxation via magnons and phonons occurring on a femtosecond time scale.

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Magnuson, M., Duda, L. C., Butorin, S. M., Kuiper, P., & Nordgren, J. (2006). Large magnetic circular dichroism in resonant inelastic x-ray scattering at the Mn L -edge of Mn-Zn ferrite. Physical Review B - Condensed Matter and Materials Physics, 74(17). https://doi.org/10.1103/PhysRevB.74.172409

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