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 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. 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

• 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

UE46-PGM1 beamline and endstations.

Selected Publications

• R. Comin, A. Frano, M. Yee, Y. Yoshida, H. Eisaki, E. Schierle, E. Weschke, F. He, R. Sutarto, A. Soumyanarayanan, Y. He, M. Le Tacon, J. E. Hoffman, B. Keimer, G.A. Sawatzky, A. Damascelli: Charge ordering driven by Fermi-arc instability in Bi₂Sr_2-xLa_xCuO_6+δ, Science 343, 390 (2014)
• A. Frano, E. Schierle, M.W. Haverkort, Y. Lu,1 M.Wu, S. Blanco-Canosa, U. Nwankwo, A.V. Boris, P.Wochner, G. Cristiani, H. U. Habermeier, G. Logvenov, V. Hinkov, E. Benckiser, E. Weschke, B. Keimer: Orbital Control of Noncollinear Magnetic Order in Nickel Oxide Heterostructures, Phys. Rev. Lett. 111, 106804 (2013)
• J. Fink, E. Schierle, E. Weschke, J. Geck: Resonant Elastic Soft X-Ray Scattering, Report on Progress in Physics 76, 056502 (2013)
• Christian F. Hermanns,Matthias Bernien, Alex Krüger, Christian Schmidt, Sören T. Waßerroth, Gelavizh Ahmadi, Benjamin W. Heinrich, Martin Schneider, Piet W. Brouwer, Katharina J. Franke, Eugen Weschke, Wolfgang Kuch: Magnetic Coupling of Gd₃N@C₈₀ Endohedral Fullerenes to a Substrate, Phys. Rev. Lett. 111, 167203 (2013)
• S. Blanco-Canosa, A. Frano, T. Loew, Y. Lu, J. Porras, G. Ghiringhelli, M. Minola, C. Mazzoli, L. Braicovich, E. Schierle, E. Weschke, M. Le Tacon, B. Keimer: Momentum-Dependent Charge Correlations in YBa₂Cu₃O_6-δ Superconductors Probed by Resonant X-Ray Scattering: Evidence for Three Competing Phases, Phys. Rev. Lett. 110, 187001 (2013)
• C. Schmitz-Antoniak, D. Schmitz, P. Borisov, F. M. F. de Groot, S. Stienen, A. Warland, B. Krumme, R. Feyerherm, E. Dudzik, W. Kleemann, H. Wende: Electric In-Plane Polarisation in Multiferroic CoFe₂O₄/BaTiO₃ Nanocomposite Tuned by Magnetic Fields, Nature Communications 4, 2051 (2013)
• 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)Ba₂Cu₃O_6+x, Science 337, 821 (2012)