Polarization analysis in the 3–25 keV range at the ESRF magnetic scattering beamline

Stunault, A.; Vettier, C.; Bergevin, F. de; Bernhoeft, N.; Fernández, Victoria I.; Langridge, S.; Lidström, Erik; Lorenzo-Diaz, J.E.; Wermeille, D.; Chabert, Laurent; Chagnon, R

doi:10.1107/s0909049597020128

Cited by 35 publications

(22 citation statements)

References 5 publications

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“…Theoretical models suggest that the resonance is due to 1s→4p electric-dipole transitions, the splitting of the 4p states being mainly due to the JT distortion that accompanies the orbital ordering. 26 -28 The experiments have been performed on the ID20 beamline 29 of the European Synchrotron Radiation Facility ͑ESRF͒ in Grenoble, France. The spectrometer exploits the third-harmonic emission of a 42-mm-period undulator device.…”

Section: Experimental Methods and Detailsmentioning

confidence: 99%

Resonant x-ray scattering study of magnetic and orbital order inKCuF3

et al. 2002

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We present the results of resonant x-ray scattering experiments on KCuF 3 . Structurally forbidden reflections, corresponding to magnetic and 3d-orbital long-range order, have been observed. Integrated intensities have been measured as a function of incident energy, polarization, azimuthal angle, and temperature. By means of ab initio local spin density approximation ͑LSDA͒ and local spin density approximation with on-site Coulomb interaction ͑LSDAϩU͒ calculations we determine the electronic structure of KCuF 3 and obtain the resonant x-ray scattering spectrum at the Cu K edge, which shows good agreement with the experimental data. Orbital and spin degrees of freedom are strongly coupled, and the temperature dependence of the intensity of orbital Bragg peaks reveals a correlation between magnetic and orbital order parameters.

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Section: Experimental Methods and Detailsmentioning

confidence: 99%

Resonant x-ray scattering study of magnetic and orbital order inKCuF3

et al. 2002

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“…7 Experiments were performed at the magnetic scattering beamline ID20 of the European Synchrotron Radiation Facility ͑ESRF͒. 12 Photons were received from two undulators ͑42-mm period͒. The beamline optics contains a doublecrystal monochromator located in between two mirrors.…”

Section: Experimental Conditionsmentioning

confidence: 99%

Probing the4pelectron-spin polarization in NiO

et al. 2001

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K-edge resonant x-ray magnetic scattering experiments have been performed on antiferromagnetic NiO. The observation of two resonances at the K edge allows the construction of models to compare the electronic properties of NiO and the observed resonant magnetic x-ray scattering. From the polarization analysis of the scattered beam, a quadrupolar transition (1sϪ3d) and a dipolar transition (1sϪ4p) are identified. While the quadrupolar transition can be modeled using an atomic picture for the 3d electrons, the dipolar transition is associated to a broadband structure of p electrons and its energy profile is compared to electronic bandstructure calculations.

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“…The experiments reported in this paper were performed at the ID20 [5] and XMaS beam lines of the ESRF, Grenoble, France. At both beam lines, a double crystal, Si(111), monochromator selects the appropriate x-ray energy, harmonics of higher incident energy are eliminated by the use of mirrors, and the scattering plane was vertical with s-incident photon polarization.…”

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Resonant Enhancements at Nonmagnetic Ions: New Possibilities for Magnetic X-Ray Scattering

et al. 2001

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Synchrotron experiments with uranium antiferromagnetic compounds have discovered large ( >1000) enhancements of the magnetic scattering intensities at the K edges of nominally nonmagnetic anions, e.g., Ga and As. The width in energy, the position with respect to the white line, and the azimuthal and polarization dependencies permit one to associate the signal with transitions of E1 dipole symmetry from 1s to 4p states. In momentum space, the signal exhibits long-range order at the antiferromagnetic wave vector. We discuss possible channels capable of generating the observed enhancements.

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Polarization analysis in the 3–25 keV range at the ESRF magnetic scattering beamline

Cited by 35 publications

References 5 publications

Resonant x-ray scattering study of magnetic and orbital order inKCuF3

Resonant x-ray scattering study of magnetic and orbital order inKCuF3

Probing the4pelectron-spin polarization in NiO

Resonant Enhancements at Nonmagnetic Ions: New Possibilities for Magnetic X-Ray Scattering

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