scholarly journals Atomic-scale investigation of MgO growth on fused quartz using angle-dependent NEXAFS measurements

RSC Advances ◽  
2018 ◽  
Vol 8 (55) ◽  
pp. 31275-31286 ◽  
Author(s):  
Jitendra Pal Singh ◽  
So Hee Kim ◽  
Sung Ok Won ◽  
Ik-Jae Lee ◽  
Keun Hwa Chae
Keyword(s):  
Fine Structure ◽  
Quartz Substrate ◽  
Atomic Scale ◽  
X Ray ◽  
Absorption Fine ◽  
Fused Quartz ◽  
X Ray Absorption

Near edge X-ray absorption fine structure measurements reveal the formation of MgO on fused quartz substrate.

scholarly journals Atomic-scale structure ofGa1−xInxPalloys measured with extended x-ray absorption fine structure spectroscopy

2008 ◽  
Vol 78 (11) ◽  
Author(s):  
C. S. Schnohr ◽  
L. L. Araujo ◽  
P. Kluth ◽  
D. J. Sprouster ◽  
G. J. Foran ◽  
...  
Keyword(s):  
Fine Structure ◽  
Scale Structure ◽  
Atomic Scale ◽  
X Ray ◽  
Absorption Fine ◽  
Atomic Scale Structure ◽  
X Ray Absorption

scholarly journals Anomalous Behavior in the Atomic Structure of Nb3Sn under High Pressure

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 331
Author(s):  
Irene Schiesaro ◽  
Simone Anzellini ◽  
Rita Loria ◽  
Raffaella Torchio ◽  
Tiziana Spina ◽  
...  
Keyword(s):  
Fine Structure ◽  
Atomic Structure ◽  
Anomalous Behavior ◽  
Local Effect ◽  
Atomic Scale ◽  
Crystallographic Structure ◽  
Structural Refinement ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

In the present study, the local atomic structure of a Nb3Sn superconductor sample has been probed by X-ray absorption fine structure (XAFS) as a function of hydrostatic pressure (from ambient up to 26 GPa) using a diamond anvil cell set-up. The analysis of the Nb-K edge extended X-ray absorption fine structure (EXAFS) data was carried out combining standard multi shell structural refinement and reverse Monte Carlo method to provide detailed in situ characterization of the pressure-induced evolution of the Nb local structure in Nb3Sn. The results highlight a complex evolution of Nb chains at the local atomic scale, with a peculiar correlated displacement of Nb–Nb and Nb–Nb–Nb configurations. Such a local effect appears related to anomalies evidenced by X-ray diffraction in other superconductors belonging to the same A15 crystallographic structure.

Local structure investigation of Co–Fe–Si–B ribbons by extended X-ray absorption fine-structure spectroscopy

2021 ◽  
Vol 28 (1) ◽  
pp. 240-246
Author(s):  
A. A. Deshmukh ◽  
A. P. Srivastava ◽  
J. P. Singh ◽  
Manish Kumar ◽  
K. H. Chae ◽  
...  
Keyword(s):  
Fine Structure ◽  
Glassy Phase ◽  
Fourier Transforms ◽  
Atomic Radius ◽  
Atomic Scale ◽  
X Ray ◽  
Absorption Fine ◽  
Glassy Alloys ◽  
The Stability ◽  
X Ray Absorption

In the present work, extended X-ray absorption fine-structure (EXAFS) investigations of Co69Fe x Si21–x B10 (x = 3, 5, 7) glassy ribbons were performed at the Co K-edge. The magnitude of the first peak of the Fourier transforms of the EXAFS signals is found to increase monotonically with increasing Si concentrations indicating the formation of the localized ordered structure at the atomic scale. The Co–Si coordination number (CN) increases at the expense of the CN of Co/Fe. Smaller interatomic distances are observed in the glassy phase compared with that in the crystalline phase which promotes the stability of the glassy phase. Calculations of the thermodynamic parameter (P HSS), cohesive energy (E C) and the atomic radius difference (δ) parameter show that the alloy composition Co69Fe3Si18B10 has a good glass-forming ability (GFA) with the highest CN of Si compared with other compositions. A linear correlation of CN with that of the GFA parameter (P HSS) exists and the CN also plays a crucial role in the GFA of the glassy alloys. This parameter should be considered in developing different GFA criteria.

Structure of magnetic thin films and nanostructures studied by extended X-ray absorption fine structure

2000 ◽  
Vol 454-456 ◽  
pp. 723-728 ◽  
Author(s):  
H. Magnan ◽  
P. Le Fèvre ◽  
A. Midoir ◽  
D. Chandesris ◽  
H. Jaffrès ◽  
...  
Keyword(s):  
Thin Films ◽  
Fine Structure ◽  
Magnetic Thin Films ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

Kinetic analysis of Ag particle redispersion into ZSM-5 in the presence of coke using in situ XAFS

2021 ◽  
Author(s):  
Kazumasa Murata ◽  
Junya Ohyama ◽  
Atsushi Satsuma
Keyword(s):  
Fine Structure ◽  
Kinetic Analysis ◽  
X Ray ◽  
Xafs Spectroscopy ◽  
Absorption Fine ◽  
Ag Particles ◽  
In Situ Xafs ◽  
Ag Particle ◽  
X Ray Absorption

In the present study, the redispersion behavior of Ag particles on ZSM-5 in the presence of coke was observed using in situ X-ray absorption fine structure (XAFS) spectroscopy.

scholarly journals Backbonding contributions to small molecule chemisorption in a metal–organic framework with open copper(i) centers

2021 ◽  
Author(s):  
Gregory M. Su ◽  
Han Wang ◽  
Brandon R. Barnett ◽  
Jeffrey R. Long ◽  
David Prendergast ◽  
...  
Keyword(s):  
Fine Structure ◽  
Small Molecule ◽  
Metal Organic Framework ◽  
X Ray ◽  
Metal Site ◽  
Absorption Fine ◽  
Metal Organic ◽  
X Ray Absorption ◽  
Organic Framework

In situ near edge X-ray absorption fine structure spectroscopy directly probes unoccupied states associated with backbonding interactions between the open metal site in a metal–organic framework and various small molecule guests.

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