Resonant x-ray scattering and full polarisation analysis of forbidden half-integer reflections in magnetite
Résumé
Magnetite is one of the oldest known magnetic materials, but questions still surround both its crystal and electronic structures at low temperature. The most debated of these low temperature properties regard the presence, or lack of, of charge and orbital order. Using resonant x-ray di raction at the iron K-edge to probe the long range order present on the iron sites, we have studied (0 0 2n+1/2 )C type reflections. By using the technique of full linear polarisation, we have shown that the key features of the reflections can be described merely using the simpli ed Pmca structure, without invoking orbital order.
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