Jjm. Michiels et al., SPIN AND SYMMETRY IN LOW-ENERGY-ELECTRON ENERGY-LOSS SPECTROSCOPY OF TRANSITION-METAL OXIDES, Journal of physics. Condensed matter, 9(39), 1997, pp. 543-548
The ratio of spin-hip to non-flip intensity in low-energy electron ene
rgy-loss spectroscopy for multiplicity-changing transitions within the
3d multiplet in NiO and CoO can be found exactly. It is shown to be i
ndependent of scattering geometry, incident energy and multiple scatte
ring if well-defined local spins are assumed. For non multiplicity-cha
nging transitions this ratio can be calculated approximately, using R-
matrix techniques. The angular dependence of the scattering processes
at low kinetic energies of the incident electron can be understood in
terms of the point group symmetry at the target ion and the contributi
on of dominant angular momentum components to incoming and outgoing el
ectron waves.