S R Bland et al 2009 J. Phys.: Condens. Matter 21 485601 doi:10.1088/0953-8984/21/48/485601
Full polarization analysis of resonant superlattice and forbidden x-ray reflections in magnetite
S R Bland1, B Detlefs2, S B Wilkins3, T A W Beale1, C Mazzoli2, Y Joly4, P D Hatton1, J E Lorenzo4 and V A M Brabers5
Show affiliationsDespite being one of the oldest known magnetic materials, and the classic mixed valence compound, thought to be charge ordered, the structure of magnetite below the Verwey transition is complex and the presence and role of charge order is still being debated. Here, we present resonant x-ray diffraction data at the iron K-edge on forbidden (0, 0, 2n+1)C and superlattice 
reflections. Full linear polarization analysis of the incident and scattered light was conducted in order to explore the origins of the reflections. Through simulation of the resonant spectra we have confirmed that a degree of charge ordering takes place, while the anisotropic tensor of susceptibility scattering is responsible for the superlattice reflections below the Verwey transition. We also report the surprising result of the conversion of a significant proportion of the scattered light from linear to nonlinear polarization.
- PACS
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71.30.+h Metal-insulator transitions and other electronic transitions
75.30.Mb Valence fluctuation, Kondo lattice, and heavy-fermion phenomena
- Subjects
- Dates
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Issue 48 (2 December 2009)
Received 25 August 2009, in final form 13 October 2009
Published 30 October 2009
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Full polarization analysis of resonant superlattice and forbidden x-ray reflections in magnetite
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