Spin-resolved Atomic Orbital Model Refinement for Combined Charge and Spin Density Analysis: Application to the YTiO3 Perovskite
Acta crystallographica Section A, Foundations and advances(2021)
摘要
A new crystallographic method is proposed in order to refine a spin-resolved atomic orbital model against X-ray and polarized neutron diffraction data. This atomic orbital model is applied to the YTiO3 perovskite crystal, where orbital ordering has previously been observed by several techniques: X-ray diffraction, polarized neutron diffraction and nuclear magnetic resonance. This method gives the radial extension, orientation and population of outer atomic orbitals for each atom. The interaction term between Ti3+, Y3+ cations and O2- ligands has been estimated. The refinement statistics obtained by means of the orbital method are compared with those obtained by the multipole model previously published.
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关键词
atomic orbital model,two-center term,polarized neutron diffraction,X-ray diffraction,perovskite,spin density,charge density
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