Saturation and self-absorption effects in the angle-dependent 2p3d resonant inelastic X-ray scattering spectra of Co3+

Angle-dependent 2p3d resonant inelastic X-ray scattering spectra of a LaCoO3 single crystal and a 55   nm LaCoO3 film on a SrTiO3 substrate are presented. Theoretical calculation shows that, with ∼ 20   meV resolved Co 2p3d resonant inelastic X-ray scattering (RIXS), the excited states of the isotropic 1A1g(Oh) ground state are split by 3d spin – orbit coupling, which can be distinguished via   their angular dependence. However, strong self-absorption and saturation effects distort the spectra of the LaCoO3 single crystal and limit the observation of small angular dependence. In contrast, the RIXS on 55   nm LaCoO3 shows less self-absorption effects and preserves the angular dependence of the excited states.

Source: Journal of Synchrotron Radiation - June 8, 2020 Category: Physics Authors: Wang, R.-P. Elnaggar, H. Titus, C.J. Tomiyasu, K. Geessinck, J. Koster, G. Frati, F. Okamoto, J. Huang, D.-J. de Groot, F.M.F. Tags: angle-dependent RIXS/RXES saturation and self-absorption effects research papers Source Type: research