scholarly journals Femtosecond X-ray magnetic circular dichroism absorption spectroscopy at an X-ray free electron laser

2016 ◽  
Vol 87 (3) ◽  
pp. 033110 ◽  
Author(s):  
Daniel J. Higley ◽  
Konstantin Hirsch ◽  
Georgi L. Dakovski ◽  
Emmanuelle Jal ◽  
Edwin Yuan ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Absorption Spectroscopy ◽  
Free Electron ◽  
Free Electron Laser ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
Circular Dichroïsm

scholarly journals Proposal of X-ray absorption spectroscopy and magnetic circular dichroism using broadband free-electron lasers

2019 ◽  
Vol 26 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Bangjie Deng ◽  
Jiawei Yan ◽  
Qingmin Zhang ◽  
Yaodong Sang ◽  
Haixiao Deng
Keyword(s):  
Circular Dichroism ◽  
Absorption Spectroscopy ◽  
Free Electron ◽  
Magnetic Circular Dichroism ◽  
Single Shot ◽  
Free Electron Lasers ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Absorption ◽  
Circular Dichroïsm

X-ray free-electron lasers (XFELs) have been widely used for applications such as X-ray crystallography and magnetic spin probes because of their unprecedented performance. Recently, time-resolved X-ray magnetic circular dichroism (XMCD) with ultrafast XFEL pulses have made it possible to achieve an instantaneous view of atomic de-excitation. However, owing to the narrow bandwidth and coherence of XFELs, X-ray absorption spectroscopy (XAS) and XMCD are time- and effort-consuming for both machine scientists and users of XFELs. In this work, an efficient scheme using a broadband XFEL pulse and single-shot X-ray spectrometer is proposed, in which the XAS and XMCD measurements can be accomplished with the same machine conditions. An evolutionary multi-objective optimization algorithm is used to maximize the XFEL bandwidth offered by the Shanghai Soft X-ray FEL user facility without additional hardware. A numerical example using MnO is demonstrated, showing that, by using approximately 1000 consecutive XFEL shots with a central photon energy of 650 eV and full bandwidth of 4.4%, precise spectral measurements for XAS and XMCD can be achieved. Additional considerations related to single-shot XAS and XMCD are discussed.

scholarly journals Soft x-ray absorption spectroscopy and magnetic circular dichroism as operando probes of complex oxide electrolyte gate transistors

2020 ◽  
Vol 116 (20) ◽  
pp. 201905
Author(s):  
Biqiong Yu ◽  
Guichuan Yu ◽  
Jeff Walter ◽  
Vipul Chaturvedi ◽  
Joseph Gotchnik ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Absorption Spectroscopy ◽  
Magnetic Circular Dichroism ◽  
Complex Oxide ◽  
X Ray ◽  
X Ray Absorption ◽  
Circular Dichroïsm ◽  
Oxide Electrolyte

Linear and magnetic circular dichroism in the Ce 4d X-ray absorption spectroscopy of CeRh3B2

1993 ◽  
Vol 186-188 ◽  
pp. 83-85
Author(s):  
K. Yamaguchi ◽  
A. Misu ◽  
H. Namatame ◽  
I. Hase ◽  
A. Fujimori ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Absorption Spectroscopy ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
X Ray Absorption ◽  
Circular Dichroïsm

X-ray absorption spectroscopy and magnetic circular dichroism of the Mn-ferrite nanocrystalline thin films

2001 ◽  
Vol 90 (5) ◽  
pp. 2511-2516 ◽  
Author(s):  
L. Štichauer ◽  
A. Mirone ◽  
S. Turchini ◽  
T. Prosperi ◽  
S. Zennaro ◽  
...  
Keyword(s):  
Thin Films ◽  
Circular Dichroism ◽  
Absorption Spectroscopy ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
X Ray Absorption ◽  
Circular Dichroïsm ◽  
Nanocrystalline Thin Films
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