Polarized neutron scattering on HYSPEC (the HYbrid SPECtrometer at SNS) : temperature evolution of dynamical magnetism in FeTe(1-x)Se(x)
Jeudi 6 juillet 2017 11:00
- Duree : 1 heure
Lieu : ILL 4, seminar room, 1st floor - 71 avenue des Martyrs - Grenoble
Orateur : Igor ZALIZNYAK (Brookhaven National Laboratory, USA)
We describe some of the first polarized neutron scattering measurements performed at HYSPEC [1-4] spectrometer at the Spallation Neutron Source, Oak Ridge National Laboratory. We discuss details of the instrument setup and the experimental procedures in the mode with full polarization analysis. We will show results of polarized neutron diffraction and polarized inelastic neutron data obtained on single crystal samples. In particular, we will show how polarization analysis allows to track the temperature evolution of spin-liquid-like dynamical magnetism in an optimally doped superconducting chalcogenide and its parent, FeTe material.
References
[1] Zaliznyak I, Ghosh V, Shapiro S and Passell L 2005 Physica B : Condensed Matter 356 150-155 ISSN 0921-4526
[2] Shapiro S, Zaliznyak I, Passell L, Ghosh V, Leonhardt W and Hagen M 2006 Physica B : Condensed Matter 385-86, Part 2 1107-109 ISSN 0921-4526
[3] Winn B, Filges U, Garlea V O, Graves-Brook M, Hagen M, Jiang C, Kenzelmann M, Passell L, Shapiro S M, Tong X and Zaliznyak I 2015 EPJ Web of Conferences 83 03017
[4] Details of HYSPEC technical speci ?cations, design and con ?guration can be found on http://neutrons.phy.bnl.gov/HYSPEC/memos technical reports.shtm. More information about the instrument can be found on the HYSPEC IDT website at BNL, http://neutrons.phy.bnl.gov/HYSPEC/, or on the SNS HYSPEC page at ORNL, http://neutrons.ornl.gov/hyspec/.
Contact : tellier@ill.fr
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