Local structure of (Ge[sub 4]Si[sub 4])[sub 5] monolayer strained-layer superlattice probed by fluorescence x-ray absorption fine structure

2001 ◽  
Author(s):  
S. Q. Wei
Keyword(s):  
Fine Structure ◽  
Local Structure ◽  
X Ray ◽  
Strained Layer ◽  
Absorption Fine ◽  
Strained Layer Superlattice ◽  
X Ray Absorption

Local structure of(Ge4Si4)5monolayer strained-layer superlattice probed by fluorescence x-ray absorption fine structure

2000 ◽  
Vol 62 (3) ◽  
pp. 1883-1888 ◽  
Author(s):  
Shiqiang Wei ◽  
Hiroyuki Oyanagi ◽  
K. Sakamoto ◽  
Y. Takeda ◽  
T. P. Pearsall
Keyword(s):  
Fine Structure ◽  
Local Structure ◽  
X Ray ◽  
Strained Layer ◽  
Absorption Fine ◽  
Strained Layer Superlattice ◽  
X Ray Absorption

scholarly journals Local Structure and Dynamics of Functional Materials Studied by X-ray Absorption Fine Structure

Symmetry ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1315
Author(s):  
Takafumi Miyanaga
Keyword(s):  
Fine Structure ◽  
Local Structure ◽  
Chemical Reactivity ◽  
Functional Materials ◽  
X Ray ◽  
Structure And Dynamics ◽  
Absorption Fine ◽  
Structure Phase Transition ◽  
Local Electronic Structure ◽  
X Ray Absorption

X-ray absorption fine structure (XAFS) is a powerful technique used to analyze a local electronic structure, local atomic structure, and structural dynamics. In this review, I present examples of XAFS that apply to the local structure and dynamics of functional materials: (1) structure phase transition in perovskite PbTiO3 and magnetic FeRhPd alloys; (2) nano-scaled fluctuations related to their magnetic properties in Ni–Mn alloys and Fe/Cr thin films; and (3) the Debye–Waller factors related to the chemical reactivity for catalysis in polyanions and ligand exchange reaction. This study shows that the local structure and dynamics are related to the characteristic function of the materials.

Extended X-ray Absorption Fine Structure Studies of GaN Epilayers Doped in situ with Er and Eu During Molecular Beam Epitaxy

2003 ◽  
Vol 798 ◽  
Author(s):  
V. Katchkanov ◽  
J. F. W. Mosselmans ◽  
S. Dalmasso ◽  
K. P. O'Donnell ◽  
R. W. Martin ◽  
...  
Keyword(s):  
Fine Structure ◽  
Rare Earth ◽  
Molecular Beam Epitaxy ◽  
Local Structure ◽  
Molecular Beam ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption ◽  
The Eu

ABSTRACTThe local structure around Er and Eu atoms introduced into GaN epilayers was studied by means of Extended X-ray Absorption Fine Structure above the appropriate rare-earth X-ray absorption edge. The samples were doped in situ during growth by Molecular Beam Epitaxy. The formation of ErN clusters was found in samples with high average Er concentrations of 32±6% and 12.4±0.8%, estimated by Wavelength Dispersive X-ray analysis. When the average Er concentration is decreased to 6.0±0.2%, 1.6±0.2% and 0.17±0.02%, Er is found in localised clusters of ErGaN phase with high local Er content. Similar behaviour is observed for Eu-doped samples. For an average Eu concentration of 30.5±0.5% clusters of pure EuN occur. Decreasing the Eu concentration to 10.4±0.5% leads to EuGaN clusters with high local Eu content. However, for a sample with an Eu concentration of 14.2±0.5% clustering of Eu was not observed.

scholarly journals Near edge x-ray absorption fine structure studies of local structure of dihexyldisulfide multilayer

2005 ◽  
Vol 54 (12) ◽  
pp. 5837
Author(s):  
Wu Tai-Quan ◽  
Tang Jing-Chang ◽  
Zhu Ping ◽  
Li Hai-Yang
Keyword(s):  
Fine Structure ◽  
Local Structure ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

scholarly journals Influence of Al on the local structure of Nd-doped TiO2 thin films: A combined luminescence and X-ray absorption fine structure analysis

2019 ◽  
Vol 246 ◽  
pp. 49-52 ◽  
Author(s):  
Mariko Murayama ◽  
Kensaku Yoda ◽  
Shuji Komuro ◽  
Hiroaki Nitani ◽  
Iain F. Crowe ◽  
...  
Keyword(s):  
Thin Films ◽  
Fine Structure ◽  
Structure Analysis ◽  
Local Structure ◽  
Tio2 Thin Films ◽  
Doped Tio2 ◽  
X Ray ◽  
Absorption Fine ◽  
Fine Structure Analysis ◽  
X Ray Absorption

XAFS Study of Molten ZrCl4 in LiCl-KCl Eutectic

2002 ◽  
Vol 57 (5) ◽  
pp. 277-280 ◽  
Author(s):  
Yoshihiro Okamoto ◽  
Haruhiko Motohashi
Keyword(s):  
Fine Structure ◽  
Coordination Number ◽  
Curve Fitting ◽  
Absorption Edge ◽  
Local Structure ◽  
Molten Mixture ◽  
X Ray ◽  
Absorption Fine ◽  
Curve Fitting Analysis ◽  
X Ray Absorption

The local structure of motlen ZrCl4 in LiCl-KCl eutectic was investigated by using an X-ray absorption fine structure (XAFS) of the Zr K-absorption edge. The nearest Zr4+-Cl- distance and coordination number from the curve fitting analysis were (2.51±0.02) Å and 5.9±0.6, respectively. These suggest that a 6-fold coordination (ZrCl6)2- is predominant in the molten mixture.

Short Range Order Strucrures in Y-Pr-Ba-Cu-O System Studied by X-Ray Absorption Fine Structure (XAFS) Techniques

1990 ◽  
Vol 209 ◽  
Author(s):  
Y.H. Kao ◽  
A. Krol ◽  
Z.H. Ming ◽  
C.S. Lin ◽  
Y.L. Soo ◽  
...  
Keyword(s):  
Fine Structure ◽  
Local Structure ◽  
Short Range ◽  
Direct Evidence ◽  
Nearest Neighbor ◽  
Compound System ◽  
Local Distribution ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

ABSTRACTLocal structure around the constituent atoms in the compound system Y1-xPrxBa2CU3O7-y has been investigated by means of x-ray absorption fine structure (XAFS) techniques. By comparing the local structure in the compound x=1 with its counterpart x=0, the XAFS results provide a direct evidence that Pr has replaced Y in the material. The nearest-neighbor structure in the CuO2 planes seems to remain intact as × varies from 0 to 1, indicating that substitution of Pr for Y does not disturb the local distribution of holes in the CuO2 planes. We suggest that local disorder and distortions in the second-neighbor bonding configuration could be responsible for suppression of superconductivity with increasing Pr content in the system.

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