Ultralow‐temperature device dedicated to soft X‐ray magnetic circular dichroism experiments. (19th October 2018)

• Record Type: Journal Article
• Authors: Kappler, J.-P.; Otero, E.; Li, W.; Joly, L.; Schmerber, G.; Muller, B.; Scheurer, F.; Leduc, F.; Gobaut, B.; Poggini, L.; Serrano, G.; Choueikani, F.; Lhotel, E.; Cornia, A.; Sessoli, R.; Mannini, M.; Arrio, M.-A.; Sainctavit, Ph.; Ohresser, P.
• Is Part Of: Journal of synchrotron radiation. Volume 25:Part 6(2018)
• Page Start: 1727
• Page End: 1735
• Publication Date: 2018-10-19
• Subjects: ultralow‐temperature -- soft X‐rays -- XMCD -- magnetism; Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577518012717
• Languages: English
• ISSNs: 0909-0495

Abstract

Abstract : A new ultralow‐temperature setup dedicated to soft X‐ray absorption spectroscopy and X‐ray magnetic circular dichroism experiments is described. Two experiments, performed on the DEIMOS beamline (SOLEIL synchrotron), demonstrate the outstanding performances of this new platform, particularly with regard to the lowest achievable temperature under X‐ray irradiation ( T = 220 mK). 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.