The Structure of Amorphous Platinum Disulfide as Studied by Anomalous X-ray Scattering

1994 ◽  
Vol 49 (11) ◽  
pp. 1031-1036 ◽  
Author(s):  
Masatoshi Saito ◽  
Makoto Wakeshima ◽  
Nobuaki Sato ◽  
Takeo Fujino ◽  
Yoshio Waseda ◽  
...  
Keyword(s):  
Variational Method ◽  
Least Squares ◽  
Absorption Edge ◽  
Structural Unit ◽  
Precipitation Process ◽  
Interference Function ◽  
X Ray ◽  
Atomic Arrangement ◽  
X Ray Scattering ◽  
Ray Scattering

Abstract Anomalous X-ray scattering (AXS) has been applied to study the structure of amorphous plati­ num disulfide, Pt1-xS2, prepared by the precipitation process. The local atomic arrangement in amorphous Pt1-xS2 was determined by the least-squares variational method so as to reproduce the experimental differential interference function at the Pt Lm absorption edge by the AXS method as well as the ordinary interference function by Mo K α. The structural unit in amorphous Pt1-xS2 is found to be a PtS6 octahedron, similar to that in crystalline PtS2. These octahedra share both their corners and edges, while only edge-sharing linkages occur in crystalline PtS2

scholarly journals High-energy-resolution diced spherical quartz analyzers for resonant inelastic X-ray scattering

2018 ◽  
Vol 25 (2) ◽  
pp. 373-377 ◽  
Author(s):  
Ayman H. Said ◽  
Thomas Gog ◽  
Michael Wieczorek ◽  
XianRong Huang ◽  
Diego Casa ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Absorption Edge ◽  
High Energy ◽  
Fabrication Process ◽  
High Energy Resolution ◽  
Magnetic Excitations ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

A novel diced spherical quartz analyzer for use in resonant inelastic X-ray scattering (RIXS) is introduced, achieving an unprecedented energy resolution of 10.53 meV at the IrL3absorption edge (11.215 keV). In this work the fabrication process and the characterization of the analyzer are presented, and an example of a RIXS spectrum of magnetic excitations in a Sr3Ir2O7sample is shown.

Resonant Inelastic Soft X-ray Scattering Studies of U(VI) Reduction on Iron Surfaces

2003 ◽  
Vol 807 ◽  
Author(s):  
S. M. Butorin ◽  
D. K. Shuh ◽  
K. Kvashnina ◽  
I. L. Soroka ◽  
K. Ollila ◽  
...  
Keyword(s):  
Absorption Edge ◽  
Spectroscopic Analysis ◽  
Ex Situ ◽  
X Ray ◽  
X Ray Scattering ◽  
Primary Photon ◽  
Liquid Cell ◽  
Uranium Species ◽  
Ray Scattering

ABSTRACTWe report on the spectroscopic analysis of several samples relevant to the processes governing the behavior of oxidized uranium species in groundwater solutions under anoxic conditions. Both Fe samples with different times of exposure to the U(IV) solution and Fe metal-solution inetrfaces in the liquid cell ex-situ and in-situ, respectively. Resonant inelastic soft x-ray scattering is shown to be sensitive to the chemical state of uranium. The measurements were performed at a number of energies of the primary photon beam across the U 5d absorption edge. The results unambiguously indicate the reduction of U(VI) to U(IV) on the Fe surface.

On the determination of partial structure functions in small-angle scattering exemplified by Al89Ni6La5alloy

2009 ◽  
Vol 42 (2) ◽  
pp. 323-325 ◽  
Author(s):  
Armin Hoell ◽  
Dragomir Tatchev ◽  
Sylvio Haas ◽  
Jörg Haug ◽  
Peter Boesecke
Keyword(s):  
Neutron Scattering ◽  
Absorption Edge ◽  
Small Angle ◽  
Structure Factor ◽  
Alloy Sample ◽  
Partial Structure ◽  
X Ray ◽  
Partial Structure Factor ◽  
X Ray Scattering ◽  
Ray Scattering

A comparison between the resonant scattering curve obtained by anomalous small-angle X-ray scattering at the X-ray absorption edge of Ni and the complementary small-angle neutron scattering curve from an Al89Ni6La5alloy sample is reported. The sample does not comply with the two-phase approximation. The two resulting scattering curves are approximately proportional to each other in this particular case. The anomalous small-angle X-ray scattering resonant curve at the Ni absorption edge equals the Ni–Ni partial structure factor and, owing to the favourable neutron scattering lengths of Ni, La and Al, the neutron scattering curve is also proportional to that partial structure factor.

Structural Study of Amorphous Co-Ferrite Film by Anomalous X-Ray Scattering

1990 ◽  
Vol 45 (9-10) ◽  
pp. 1144-1150 ◽  
Author(s):  
E. Matsubara ◽  
K. Okuda ◽  
Y. Waseda ◽  
S. N. Okuno ◽  
K. Inomata
Keyword(s):  
Absorption Edge ◽  
Lower Energy ◽  
Ferrite Film ◽  
X Ray ◽  
Lower Energy Side ◽  
X Ray Scattering ◽  
Oxygen Coordination ◽  
Energy Side ◽  
Absorption Edges ◽  
Ray Scattering

Abstract The structure of amorphous Co-ferrite film grown on a glass substrate was studied by anomalous X-ray scattering (AXS). Co atoms cannot be distinguished from Fe atoms with the usual X-ray diffraction technique. Therefore the AXS method at the Fe and Co K-absorption edges was adopted. In the previous AXS studies only the lower energy side of the absorption edges was adopted. In the previous AXS studies only the lower energy side of the absorption edge was used. In the present case, the lower energy side of the Co K-absorption edge corresponds to the higher energy side of the Fe K-absorption edge. Therefore, in order to overcome this inconvenience, the scattering was measured on both sides of the absorption edge, thus enabling the independent determination of the oxygen coordination numbers around Co and Fe in the ferrite film from the environmental RDFs estimated from the energy differential profiles by coupling with the linear least squares technique.

Ordered Structure in Lead Magnoniobate (PMN) by Resonant X-Ray Scattering

1996 ◽  
Vol 437 ◽  
Author(s):  
V. Gosula ◽  
Haydn Chen ◽  
S. Teslic ◽  
T. Egami ◽  
S. Vakhrushev
Keyword(s):  
Electron Diffraction ◽  
Absorption Edge ◽  
Relaxor Ferroelectric ◽  
Ordered Structure ◽  
Two Phase ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Factor ◽  
Microscopic Origin ◽  
Ray Scattering

AbstractHalf integer superlattice reflections characteristic of ordered structure in PMN (Pb(Mg1,3Nb2,3)O3) single crystal have been measured using resonant synchrotron x-ray scattering near the Pb LIII absorption edge. These superlattice peaks have been previously reported in PMN by electron diffraction, and were interpreted in the context of a two phase Nb/Mg ordering model to explain its relaxor ferroelectric behavior. Nevertheless, the microscopic origin of the superlattice peaks is controversial. Previous results have shown that the Nb atom contributes heavily to the superlattice peaks. However, the effective scattering factor for these peaks is significantly smaller than in the case of complete ordering. In addition, there is strong evidence that lead participates in the ordering.

Determination of the chiral structure of using anomalous x-ray scattering near the Cs K absorption edge

1996 ◽  
Vol 8 (38) ◽  
pp. 7059-7065 ◽  
Author(s):  
T Koiso ◽  
K Yamamoto ◽  
Y Hata ◽  
Y Takahashi ◽  
E Kita ◽  
...  
Keyword(s):  
Absorption Edge ◽  
Chiral Structure ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Anomalous X-Ray Scattering at Wave-lengths far from an Absorption Edge

Nature ◽  
1955 ◽  
Vol 176 (4478) ◽  
pp. 395-395 ◽  
Author(s):  
S. W. PETERSON
Keyword(s):  
Absorption Edge ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Er L3-edge resonant elastic X-ray scattering study of orbital ordering in ErVO3

2011 ◽  
Vol 1 (SRMS-7) ◽  
Author(s):  
K. Ikeuchi ◽  
H. Nakao ◽  
Y. Murakami ◽  
S. Miyasaka ◽  
Y. Tokura
Keyword(s):  
Absorption Edge ◽  
Orbital Ordering ◽  
X Ray ◽  
Type Orbital ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering

Resonant elastic X-ray scattering (RXS) at the erbium absorption edge was investigated in the orbital-ordered compound ErVO3. An RXS signal resonating near the Er L3-edge was clearly observed at (1 0 0). Using this signal, we studied the relation between the anisotropy of the Er 5d orbital and the V 3d orbital ordering because the covalency between the Er 5d and V 3d orbitals is expected to stabilize the C-type orbital ordering of the V 3d electrons.

Anomalous grazing-incidence small-angle X-ray scattering of Ga2O3-based nanoparticles

2018 ◽  
Vol 51 (2) ◽  
pp. 436-445 ◽  
Author(s):  
Christine Revenant
Keyword(s):  
Absorption Edge ◽  
Small Angle ◽  
Incident Angle ◽  
Grazing Incidence ◽  
Core Shell ◽  
Dense Layer ◽  
Anomalous Scattering ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Grazing-incidence small-angle X-ray scattering (GISAXS) performed at several X-ray energies in the vicinity of the absorption edge of a considered element is called anomalous GISAXS (AGISAXS). This emerging technique takes advantage of the variation of the scattering factor near an absorption edge, allowing the morphology of multi-component nanomaterials to be unraveled. The selected model system for AGISAXS simulations is mainly an In2O3layer containing Ga2O3-based nanoparticles. The transmission coefficients at the different X-ray energies near the GaKedge are identical at one specific incident angle (near the critical angle). Hence, it could be relevant to perform AGISAXS at this incident angle in order to cancel the transmission modification as the X-ray energy changes. For buried nanoparticles, grazing-incidence effects are negligible with respect to the anomalous element-specific contribution provided that the experiments are performed at energies a few electronvolts below the absorption edge. Interestingly, AGISAXS has a clearly different intensity behaviorversusX-ray energy for an embedded monodisperse spherical particle, a hole and a core–shell particle. Hence, AGISAXS can be used to unambiguously distinguish such embedded particles. Moreover, even for a dense layer of core–shell nanoparticles on a substrate, anomalous effects are much larger than grazing effects as the X-ray energy changes. Finally, it is shown that experimental anomalous scattering can be significant and can be satisfactorily simulated.

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