Montel mirror based collimating analyzer system for high-pressure resonant inelastic X-ray scattering experiments.
J Synchrotron Radiat
; 27(Pt 4): 963-969, 2020 Jul 01.
Article
em En
| MEDLINE
| ID: mdl-33566005
Resonant inelastic X-ray scattering (RIXS) is increasingly playing a significant role in studying highly correlated systems, especially since it was proven capable of measuring low-energy magnetic excitations. However, despite high expectations for experimental evidence of novel magnetic phases at high pressure, unequivocal low-energy spectral signatures remain obscured by extrinsic scattering from material surrounding the sample in a diamond anvil cell (DAC): pressure media, Be gasket and the diamond anvils themselves. A scattered X-ray collimation based medium-energy resolution (â¼100â
meV) analyzer system for a RIXS spectrometer at the Ir L3-absorption edge has been designed and built to remediate these difficulties. Due to the confocal nature of the analyzer system, the majority of extrinsic scattering is rejected, yielding a clean low-energy excitation spectrum of an iridate Sr2IrO4 sample in a DAC cell. Furthermore, the energy resolution of different configurations of the collimating and analyzing optics are discussed.
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01-internacional
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MEDLINE
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En
Revista:
J Synchrotron Radiat
Ano de publicação:
2020
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Article