Scientific instruments for soft X-ray photon-in/photon-out spectroscopy on the PAL-XFEL

2019 ◽  
Vol 26 (4) ◽  
pp. 1031-1036 ◽  
Author(s):  
Sang Han Park ◽  
Jungbum Yoon ◽  
Changsoo Kim ◽  
Chanyong Hwang ◽  
Dong-Hyun Kim ◽  
...  
Keyword(s):  
Multilayer Film ◽  
Magnetic Circular Dichroism ◽  
Scientific Instruments ◽  
X Ray ◽  
X Ray Scattering ◽  
Set Up ◽  
X Ray Absorption ◽  
Magnetic Circular Dichroism Spectra ◽  
Optical Laser ◽  
Pal Xfel

An overview is given of the soft X-ray photon-in/photon-out instruments on the free-electron laser (FEL) beamline at the Pohang Accelerator Laboratory, and selected commissioning results are presented. The FEL beamline provides a photon energy of 270 to 1200 eV, with an energy bandwidth of 0.44%, an energy of 200 µJ per pulse and a pulse width of <50 fs (full width at half-maximum). The estimated total time resolution between optical laser and X-ray pulses is <100 fs. Instruments for X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS) have been set up. X-ray magnetic circular dichroism spectra for a Co/Pt multilayer film and RIXS spectra for α-Fe2O3(100) have been obtained and the performance of the spectrometer has been evaluated.

scholarly journals Observation of X-Ray Absorption Magnetic Circular Dichroism in well-Characterized Iron-Cobalt-Platinum Multilayers

1993 ◽  
Vol 313 ◽  
Author(s):  
A.F. Jankowski ◽  
G.D. Waddill ◽  
J.G. Tobin
Keyword(s):  
Circular Dichroism ◽  
Film Growth ◽  
Magnetic Circular Dichroism ◽  
Depth Profiling ◽  
X Ray ◽  
X Ray Scattering ◽  
Transmission Electron ◽  
Magnetron Sputter Deposition ◽  
X Ray Absorption ◽  
Circular Dichroïsm

ABSTRACTMagnetic circular dichroism in the Fe 2p x-ray absorption is observed in multilayers of (Fe9.5Å/Pt9.5Å)92. The Magnetization and helicity are both in the plane of this multilayer which is prepared by magnetron sputter deposition. This sample is part of a study to examine magnetization in the ternary multilayer system of FeCo/Pt. Lattice and layer pair spacings are measured using x-ray scattering. The atomic concentration profiles of the multilayer films are characterized using Auger electron spectroscopy coupled with depth profiling. Conventional and high resolution transmission electron microscopy are used to examine the thin film, growth morphology and atomic structure.

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

scholarly journals Vibrational resonant inelastic X-ray scattering in liquid acetic acid: a ruler for molecular chain lengths

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Viktoriia Savchenko ◽  
Iulia Emilia Brumboiu ◽  
Victor Kimberg ◽  
Michael Odelius ◽  
Pavel Krasnov ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Acetic Acid ◽  
Molecular Chain ◽  
X Ray ◽  
X Ray Scattering ◽  
Localized Excitations ◽  
Vibrational Excitations ◽  
Chain Lengths ◽  
X Ray Absorption ◽  
Ray Scattering

AbstractQuenching of vibrational excitations in resonant inelastic X-ray scattering (RIXS) spectra of liquid acetic acid is observed. At the oxygen core resonance associated with localized excitations at the O–H bond, the spectra lack the typical progression of vibrational excitations observed in RIXS spectra of comparable systems. We interpret this phenomenon as due to strong rehybridization of the unoccupied molecular orbitals as a result of hydrogen bonding, which however cannot be observed in x-ray absorption but only by means of RIXS. This allows us to address the molecular structure of the liquid, and to determine a lower limit for the average molecular chain length.

scholarly journals Crystalline and magnetic structure of Ba2CuO3+δ investigated by x-ray absorption spectroscopy and resonant inelastic x-ray scattering

2020 ◽  
pp. 1353810
Author(s):  
Roberto Fumagalli ◽  
Abhishek Nag ◽  
Stefano Agrestini ◽  
Mirian Garcia-Fernandez ◽  
Andrew C. Walters ◽  
...  
Keyword(s):  
Magnetic Structure ◽  
Absorption Spectroscopy ◽  
X Ray ◽  
X Ray Scattering ◽  
X Ray Absorption ◽  
Ray Scattering
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