UE46_PGM-1

UE46_PGM-1

UE46_PGM-1 is one of two beamlines situated at the elliptical undulator UE46. The beamline provides soft x-rays with tunable polarization (linear, circular) in the energy range between 120 eV and 2000 eV. It has a plane-grating design, the last mirror chamber is equipped with two mirrors to switch between focussed and collimated beam. The beamline hosts three endstations: an XUV Diffractometer, a High-field Diffractometer, and a 30 Tesla Pulsed Field station for XAS and diffraction.

Optical layout of the UE46_PGM-1 beamline

UE46-PGM1 beamline and endstations.

UE46_PGM-1 is one of two beamlines situated at the elliptical undulator UE46. The beamline provides soft x-rays with tunable polarization (linear, circular) in the energy range between 120 eV and 2000 eV. It has a plane-grating design, the last mirror chamber hosts two mirrors that can be switched to provide a focussed or collimated beam. Techniques employed at UE46_PGM-1 include polarization-dependent x-ray absorption and resonant soft x-ray scattering experiments, covering a wide range of materials and scientific problems. Continuous-mode scanning is implemented at the beamline, a pair of energy-dependent x-ray absorption scans with opposite light helicities can be recorded with very high quality within less than 10 minutes. Depending on the sample, noise ratios as low as 10^-4 can be achieved. The beamline hosts two permanent endstations, the XUV Diffractometer, an instrument dedicated to high performance RSXS studies and the High-Field Diffractometer, an instrument for RSXS and XAS studies in magnetic fields up to 7 Tesla. RSXS and XAS in magnetic fields up to 30 Tesla are available with a recently installed Pulsed Field setup.  Beamline and instruments are operated by the Institute Quantum Phenomena in Novel Materials at HZB.

Selected Applications

• Resonant diffraction from magnetic, charge, and orbital order superstructures
• Spectroscopy of electronic ordering phenomena
• Magnetization states of single molecular magnets
• Element-specific magnetic hysteresis loops
• Magnetization depth profiles

Selected Publications

• Yamamoto, Sh.; Gorbunov, D.I.; Prokhnenko, O.; Weschke, E.; Miyata, A.; Diaz-Ortega, I.F.; Strohm, C.; Duc, F.; Henriques, M.S.; Gazizulina, A.; Uhlarz, M.; Mathon, O.; Andreev, A.V.; Nojiri, H.; Wosnitza, J.: Field-induced magnetic transitions in the highly anisotropic ferrimagnet ErFe₅Al₇ studied by high-field x-ray magnetic dichroism. Physical Review B 109 (2024), p. 094404/1-11

• Kang, M.; Zhang, C.C.; Schierle, E.; McCoy, S.; Li, J.; Sutarto, R.; Suter, A.; Prokscha, T.; Salman, Z.; Weschke, E.; Cybart, S.; Wei, J.Y.T.; Comin, R.: Discovery of charge order in a cuprate Mott insulator. Proceedings of the National Academy of Sciences of the United States of America : PNAS 120 (2023), p. e2302099120/1-7

• Li, Q.; Huang, H.Y.; Ren, T.; Weschke, E.; Ju, L.; Zou, C.; Zhang, S.; Qiu, Q.; Liu, J.; Ding, S.; Singh, A.; Prokhnenko, O.; Huang, D.J.; Esterlis, I.; Wang, Y.; Xie, Y.; Peng, Y.: Prevailing Charge Order in Overdoped La_2-xSr_xCuO₄ beyond the Superconducting Dome. Physical Review Letters 131 (2023), p. 116002/1-7

• Shaw, J.M.; Knut, R.; Armstrong, A.; Bhandary, S.; Kvashnin, Y.; Thonig, D.; Delczeg-Czirjak, E.K.; Karis, O.; Silva, T.J.; Weschke, E.; Nembach, H.T.; Eriksson, O.; Arena, D.A.: Quantifying Spin-Mixed States in Ferromagnets. Physical Review Letters 127 (2021), p. 207201/1-6

• Ghiringhelli, G.; Le Tacon, M.; Minola, M.; Blanco-Canosa, S.; Mazzoli, C.; Brookes, N.B.; De Luca, G.M.; Frano, A.; Hawthorn, D.G.; He, F.; Loew, T.; Sala, M.M.; Peets, D.C.; Salluzzo, M.; Schierle, E.; Sutarto, R.; Sawatzky, G.A.; Weschke, E.; Keimer, B.; Braicovich, L.: Long-Range Incommensurate Charge Fluctuations in (Y,Nd)Ba₂Cu₃O_6+x. Science 337 (2012), p. 821-825
  doi: 10.1126/science.1223532

• Fink, J.; Schierle, E.; Weschke, E.; Geck, J.: Resonant elastic soft x-ray scattering. Reports on Progress in Physics 76 (2013), p. 056502/1-59