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- W2773486564 abstract "Fe ${L}_{2,3}$-edge x-ray absorption spectra (XAS) and magnetic circular dichroism (MCD) in resonant inelastic x-ray scattering (RIXS) of $ensuremath{alpha}text{ensuremath{-}}{mathrm{Fe}}_{2}{mathrm{O}}_{3}$ were measured to identify the electronic structure responsible for its weak ferromagnetism caused by the Dzyaloshinskii-Moriya interaction (DMI) at room temperature. In contrast to negligible MCD in XAS, MCD in RIXS (RIXS-MCD) was clearly observed in the $dd$ excitation at 1.8 eV via excitation to charge-transfer states. Furthermore, RIXS-MCD showed a crystal orientation dependence, indicating that the observed RIXS-MCD originated from DMI. The observed RIXS-MCD is well described by ab initio charge-transfer multiplet calculations, revealing that the RIXS-MCD derives from spin flip excitations at delocalized ${e}_{mathrm{g}}$ orbitals. By the combination of the experiments and calculations, RIXS-MCD has unraveled that the origin of DMI in $ensuremath{alpha}text{ensuremath{-}}{mathrm{Fe}}_{2}{mathrm{O}}_{3}$ is the ${e}_{mathrm{g}}$ orbitals, which are strongly hybridized with the $2p$ orbitals of oxygen atoms. The results demonstrate the importance of RIXS-MCD for identifying the electronic structure related to DMI." @default.
- W2773486564 created "2017-12-22" @default.
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- W2773486564 date "2017-12-14" @default.
- W2773486564 modified "2023-10-15" @default.
- W2773486564 title "Dzyaloshinskii-Moriya interaction in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>α</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mi>Fe</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math> measured by magnetic circular dichroism in resonant inelastic soft x-ray scattering" @default.
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- W2773486564 doi "https://doi.org/10.1103/physrevb.96.214420" @default.
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