Single-crystal X-ray diffraction and resonant X-ray magnetic scattering at helium-3 temperatures in high magnetic fields at beamline P09 at PETRA III

Francoual, S.; Skaugen, A.; Blume, J.; Poli, S.; Canfield, P. C.; Lograsso, T.; Strempfer, J.; Liu, Y.; Wolff-Fabris, F.; Warren, J.

doi:10.1107/S1600577515014149

Journal Article

PUBDB-2015-03477

Single-crystal X-ray diffraction and resonant X-ray magnetic scattering at helium-3 temperatures in high magnetic fields at beamline P09 at PETRA III

Francoual, S. (Corresponding author)DESY* ; Strempfer, J.DESY* ; Warren, J. ; Liu, Y. ; Skaugen, A.>Extern* ; Poli, S. ; Blume, J.DESY* ; Wolff-Fabris, F.>Extern*XFEL.EU* ; Canfield, P. C. ; Lograsso, T.

2015
IUCr Chester

Journal of synchrotron radiation 22(5), 1207 - 1214 (2015) [10.1107/S1600577515014149]

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Please use a persistent id in citations: doi:10.1107/S1600577515014149

Abstract: The resonant scattering and diffraction beamline P09 at PETRA III at DESY is equipped with a 14 T vertical field split-pair magnet. A helium-3 refrigerator is available that can be fitted inside the magnet's variable-temperature insert. Here the results of a series of experiments aimed at determining the beam conditions permitting operations with the He-3 insert are presented. By measuring the tetragonal-to-orthorhombic phase transition occurring at 2.1 K in the Jahn-Teller compound TmVO$_{4}$, it is found that the photon flux at P09 must be attenuated down to 1.5 × 10$^{9}$ photons s$^{-1}$ for the sample to remain at temperatures below 800 mK. Despite such a reduction of the incident flux and the subsequent use of a Cu(111) analyzer, the resonant X-ray magnetic scattering signal at the Tm L$_{III}$ absorption edge associated with the spin-density wave in TmNi$_{2}$B$_{2}$C below 1.5 K is intense enough to permit a complete study in magnetic field and at sub-Kelvin temperatures to be carried out.

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