XUV Diffractometer

XUV Diffractometer for Resonant Soft X-Ray Scattering

The XUV Diffractometer is a dedicated endstation to explore electronic ordering phenomena, like magnetic, charge and orbital ordering by resonant soft x-ray scattering (RSXS) experiments. This versatile endstation is a UHV-compatible two-circle diffractometer operating in horizontal scattering geometry with the sample and detector rotations driven from outside vacuum by Huber circles with highest accuracy and stability. It allows to perform high quality diffraction experiments even from tiny crystals (< 100μm x 100μm) over a large angular range as well as measurements of specular reflectivity with very high accuracy. With the samples mounted directly to a LHe-flow-cryostat, sample temperatures below 4 K can be reached. Azimuthal rotation in situ is provided for azimuth-dependent measurements. Photons are detected by an AXUV100-type photodiode with a set of changeable slits in front for optimizing the q-resolution. The detector can be scanned in the direction perpendicular to the scattering plane. This allows to compensate possible Chi-misalignment without compromising about the lowest sample temperatures. The experimental setup allows for x-ray absorption (XAS) masurements by parallel monitoring of the sample drain current (TEY measurements) as well as for FY measurements. The instrument is flexible and can adapt to special sample mounting. The endstation is permanently attached to the UE46_PGM-1 beamline providing high photon flux between 120eV and 2000 eV and variable photon polarization. The beamline also hosts the High-Field Diffractometer, an instrument for RSXS and XAS studies in magnetic fields up to 7 Tesla. Both instruments can be used within the same beam time. Beamline and instruments are operated by the Department Quantum Phenomena in Novel Materials at HZB.


Selected Applications

  • Diffraction from complex electronic ordering phenomena (magnetic, charge and orbital order )
  • Interfacial electronic properties in heterostructures
  • Magnetic structure determination even from tiny single crystals and nanostructures
  • Magnetization depth profiles

Station data
Monochromator PGM
Experiment in vacuum yes
Temperature range 3.8 - 320 K ( for T = 3.0 K contact Station Managers)
Detector AXUV100 type photodiode
Manipulators
Scattering Geometry horizontal
Angular range unlimited (360 deg.)
maximum sample size 5 mm x 5 mm
azimuthal sample rotation yes
Software SPEC
Phone Number (8062) 14717

Methods

Reflectometry, Single Crystal Diffraction, REXS, Magnetic Scattering

Selected Publications

  • G. Ghiringhelli, M. Le Tacon, M. Minola, S. Blanco-Canosa, C. Mazzoli, N. B. Brookes, G. M. De Luca, A. Frano, D. G. Hawthorn, F. He, T. Loew, M. Moretti Sala, D. C. Peets, M. Salluzzo, E. Schierle, R. Sutarto, G. A. Sawatzky, E. Weschke, B. Keimer, L. Braicovich: Long-Range Incommensurate Charge Fluctuations in (Y,Nd)Ba2Cu3O6+x, Science 337, 821 (2012)

Publications