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Multielectron excitations probed by helicity-modulation XMCD at K-edge in 3d transition metal compounds
N Kawamura1, T Yamamoto, H Maruyama
1SPring-8/RIKEN, Mikaduki, Hyogo, Japan. naochan@spring8.or.jp
Multielectron excitations (MEE) in 3d transition metals were studied using X-ray magnetic circular dichroism (XMCD). A signal linked to MEE was found, potentially explained by super Coster-Kronig transitions.
Area of Science:
- Solid-state physics
- X-ray spectroscopy
- Magnetism
Background:
- Multielectron excitations (MEE) are complex phenomena in transition metal compounds.
- X-ray magnetic circular dichroism (XMCD) is a powerful technique for probing magnetic properties.
Purpose of the Study:
- To investigate multielectron excitations (MEE) in 3d transition metal compounds.
- To verify the role of super Coster-Kronig transitions in MEE phenomena.
Main Methods:
- X-ray magnetic circular dichroism (XMCD) measurements at the K-edge.
- Helicity-modulation method for XMCD data acquisition.
- Theoretical calculations of dichroic spectra.
Main Results:
- A distinct dichroic signal associated with MEE was identified 50-70 eV above the absorption edge.
- The observed signal aligns with the proposed super Coster-Kronig transition mechanism.
- Calculated spectra support the interpretation of MEE via 3p to 3d transitions.
Conclusions:
- The study confirms the presence of MEE in 3d transition metals.
- Super Coster-Kronig transitions provide a viable explanation for the observed MEE phenomena.
- XMCD is effective in characterizing complex electronic excitations in magnetic materials.
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