Intrinsic and extrinsic x-ray absorption effects in soft x-ray diffraction from the superstructure in magnetite

Details Intrinsic and extrinsic x-ray absorption effects in soft x-ray diffraction from the superstructure in magnetite Intrinsic and extrinsic x-ray absorption effects in soft x-ray diffraction from the superstructure in magnetite

2011-01-13

arxiv.org/abs/1101.2548v1

Physics

Condensed Matter

Strongly Correlated Electrons

to appear in Phys. Rev. B

Scientific paper

We studied the (001/2) diffraction peak in the low-temperature phase of magnetite (Fe3O4) using resonant soft x-ray diffraction (RSXD) at the Fe-L2,3 and O-K resonance. We studied both molecular-beam-epitaxy (MBE) grown thin films and in-situ cleaved single crystals. From the comparison we have been able to determine quantitatively the contribution of intrinsic absorption effects, thereby arriving at a consistent result for the (001/2) diffraction peak spectrum. Our data also allow for the identification of extrinsic effects, e.g. for a detailed modeling of the spectra in case a "dead" surface layer is present that is only absorbing photons but does not contribute to the scattering signal.

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