This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevB.82.115110 in citations.
Please use the identifier: http://hdl.handle.net/2128/10971 in citations.
Symmetry and charge order in Fe2OBO3 studied through polarized resonant x-ray diffraction
Symmetry and charge order in Fe2OBO3 studied through polarized resonant x-ray diffraction
Bond valence sum calculations have previously suggested that iron oxyborate exhibits charge order of the Fe ions with integer 2+/3+ valence states. Meanwhile transition metal oxides typically show much smaller, fractional charge disproportionations. Using resonant x-ray diffraction at the iron K edg...
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Personal Name(s): | Bland, S.R. |
---|---|
Angst, M. / Adiga, S. / Scagnoli, V. / Johnson, R.D. / Herrero-Martin, J. / Hatton, P.D. | |
Contributing Institute: |
JCNS; JCNS JARA-FIT; JARA-FIT Neutronenstreuung; IFF-5 Streumethoden; IFF-4 |
Published in: | Physical Review B Physical review / B, 82 82 (2010 2010) 11 11, S. 115110 115110 |
Imprint: |
College Park, Md.
APS
2010
|
Physical Description: |
115110 |
DOI: |
10.1103/PhysRevB.82.115110 |
Document Type: |
Journal Article |
Research Program: |
BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) |
Series Title: |
Physical Review B
82 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10971 in citations.
Bond valence sum calculations have previously suggested that iron oxyborate exhibits charge order of the Fe ions with integer 2+/3+ valence states. Meanwhile transition metal oxides typically show much smaller, fractional charge disproportionations. Using resonant x-ray diffraction at the iron K edge, we find resonant features which are much larger than those ordinarily observed in charge ordered oxides. Simulations were subsequently performed using a cluster-based, monoelectronic code. The nanoscale domain structure prevents precise fitting; nevertheless the simulations confirm the diagonal charge order symmetry, as well as the unusually large charge disproportionation. We have demonstrated the conversion of linearly to nonlinearly polarized light and vice versa through full polarization analysis. Simulations show that this effect principally results from interference between the isotropic and anisotropic scattering terms. This mechanism is likely to account for similar observations in alternative systems. |