Full Polarization Analysis of Resonant Superlattice and Forbidden x-ray Reflections in Magnetite
Despite 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){sub C} and superlattice (0, 0, 2n+1/2)C 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.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1040243
- Report Number(s):
- BNL-90698-2009-JA; R&D Project: PO-011; KC0101010; TRN: US1202364
- Journal Information:
- Journal of Physics: Condensed Matter, Vol. 21, Issue 48
- Country of Publication:
- United States
- Language:
- English
Similar Records
Investigation of the Presence of Charge Order in Magnetite by Measurement of the Sprin Wave Spectrum
Charge-Orbital Ordering and Verwey Transition in Magnetite Measured by Resonant Soft X-Ray Scattering