Jp. Hill et al., K-EDGE RESONANT X-RAY MAGNETIC SCATTERING FROM A TRANSITION-METAL OXIDE - NIO, Physical review. B, Condensed matter, 55(14), 1997, pp. 8662-8665
We report the observation of resonant x-ray magnetic scattering in the
vicinity of the Ni K edge in the antiferromagnet NiO. An approximatel
y twofold increase in the scattering is observed as the incident photo
n energy is tuned through a pre-edge feature in the absorption spectru
m, associated with quadrupolar (1s-->3d) transitions. No enhancement i
s observed at the dipolar (1s-->4p) maximum. The quadrupolar resonant
scattering amplitude is estimated to be similar to 0.01r(0).