scholarly journals Determination of the local structure of Sr2−xMxIrO4 (M = K, La) as a function of doping and temperature

2018 ◽  
Vol 20 (36) ◽  
pp. 23783-23788 ◽  
Author(s):  
Kensei Terashima ◽  
Eugenio Paris ◽  
Eduardo Salas-Colera ◽  
Laura Simonelli ◽  
Boby Joseph ◽  
...  
Keyword(s):  
Fine Structure ◽  
Local Structure ◽  
Lattice Structure ◽  
Doping Effect ◽  
X Ray ◽  
Absorption Fine ◽  
Local Lattice ◽  
Carrier Doping ◽  
X Ray Absorption

The carrier doping effect on the local lattice structure of Sr2IrO4 has been studied by extended X-ray absorption fine structure measurements.

STUDY OF LOCAL STRUCTURE IN UNDER-DOPED La2-xSrxCuO4-y BY POLARIZED EXAFS

2002 ◽  
Vol 16 (11n12) ◽  
pp. 1641-1648 ◽  
Author(s):  
K. B. GARG ◽  
C. SANCHEZ ◽  
J. GARCIA ◽  
J. BLASCO ◽  
R. K. SINGHAL ◽  
...  
Keyword(s):  
Fine Structure ◽  
Single Crystal ◽  
Temperature Dependence ◽  
Local Structure ◽  
X Ray ◽  
Absorption Fine ◽  
Local Lattice ◽  
X Ray Absorption

Temperature dependence of local structure of the CuO 2 plane has been studied by in plane polarized (E//ab) Cu K-edge extended X-ray absorption fine structure (EXAFS) experiments on an under-doped single crystal of superconducting La1.87Sr0.13CuO 4-y system with T c =32  K . The temperature dependence of the Debye–Waller factors for the Cu-O and Cu-La/Sr pairs are determined. We find that the motion of Cu and O atoms in the Cu-O bond is partially correlated at higher temperatures, going over to an uncorrelated motion at lower temperatures. The results are discussed in terms of the local lattice instabilities and stripes as reported in other systems.

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.

scholarly journals Determination of Chemical Form of Antimony in Contaminated Soil around a Smelter Using X-ray Absorption Fine Structure

2005 ◽  
Vol 21 (7) ◽  
pp. 769-773 ◽  
Author(s):  
Masaki TAKAOKA ◽  
Satoshi FUKUTANI ◽  
Takashi YAMAMOTO ◽  
Masato HORIUCHI ◽  
Naoya SATTA ◽  
...  
Keyword(s):  
Fine Structure ◽  
Contaminated Soil ◽  
Chemical Form ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

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
Sign in / Sign up

Export Citation Format

Share Document