Coaligning arrays of air-sensitive single crystals for inelastic neutron scattering experiments

10th International Conference on Materials and Mechanisms of Superconductivity

Friemel, G.^1 ; Ohl, M.^1 ; Park, J.T.^1 ; Keimer, B.^1 ; Inosov, D.S.^1

Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany^1

关键词: Ambient atmosphere;    Argon atmospheres;    High-temperature superconductivity;    Inelastic neutrons;    Iron chalcogenides;    Single-crystalline;    Technical challenges;    Unconventional superconductivity;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/449/1/012016/pdf
DOI  :  10.1088/1742-6596/449/1/012016

来源: IOP

【 摘 要 】

The immense achievements of inelastic neutron scattering (INS) in recent years on the way to understanding the mechanism of high-temperature superconductivity were to a great extent enabled by the progress in fabricating large single-crystalline samples or coaligned mosaics consisting of up to several hundreds of individual single crystals. With the recent discovery of unconventional superconductivity in iron-based compounds, many of which can only be synthesized as relatively small crystals that rapidly decompose or deteriorate in air, we were faced with the technical challenge of preparing coaligned single-crystal arrays without exposing the samples to the ambient atmosphere. Here we describe a possible solution to this problem, which we have successfully employed to coalign both iron-pnictide and iron-chalcogenide single crystals in an argon atmosphere using a real-time digital x-ray Laue backscattering camera.