Published in
International Union of Crystallography, Journal of Synchrotron Radiation, 6(25), p. 1727-1735, 2018
DOI: 10.1107/s1600577518012717
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Ultralow-temperature device dedicated to soft X-ray magnetic circular dichroism experiments
,
W. Li,
L. Joly,
G. Schmerber,
B. Muller,
F. Scheurer,
F. Leduc,
B. Gobaut,
L. Poggini,
G. Serrano,
F. Choueikani,
E. Lhotel,
A. Cornia,
R. Sessoli
and other authors.
Full text: Unavailable
Abstract
A new ultralow-temperature setup dedicated to soft X-ray absorption spectroscopy and X-ray magnetic circular dichroism (XMCD) experiments is described. Two experiments, performed on the DEIMOS beamline (SOLEIL synchrotron), demonstrate the outstanding performance of this new platform in terms of the lowest achievable temperature under X-ray irradiation (T = 220 mK), the precision in controlling the temperature during measurements as well as the speed of the cooling-down and warming-up procedures. Moreover, owing to the new design of the setup, the eddy-current power is strongly reduced, allowing fast scanning of the magnetic field in XMCD experiments; these performances lead to a powerful device for X-ray spectroscopies on synchrotron-radiation beamlines facilities.