Short Range Order Structure Around Oxygen Atoms in the Superconductor Y-Ba-Cu-O

1987 ◽  
Vol 99 ◽  
Author(s):  
S. C. Woronick ◽  
W. Ng ◽  
A. Krol ◽  
B. X. Yang ◽  
Y. H. Kao ◽  
...  
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Local Environment ◽  
Order Structure ◽  
Total Electron Yield ◽  
Total Electron ◽  
X Ray ◽  
Superconducting Compound ◽  
X Ray Absorption ◽  
Oxygen Atoms

ABSTRACTSpectra of the oxygen K-edge extended x-ray absorption fine structure (EXAFS) of the superconducting compound Y-Ba-Cu-O were obtained by measuring the total electron yield as a function of incident x-ray energy at temperatures between 77K and 300K. This technique affords a convenient way for probing the local environment around the oxygen atoms and soft modes in the lattice.

Local Environment Around Barium Atoms in the Superconductor Y-Ba-Cu-O

1987 ◽  
Vol 99 ◽  
Author(s):  
A. Krol ◽  
F. Xu ◽  
L. Y. Jang ◽  
C. J. Sher ◽  
S. Spagna ◽  
...  
Keyword(s):  
Fine Structure ◽  
Local Structure ◽  
Short Range ◽  
Short Range Order ◽  
Local Environment ◽  
Range Order ◽  
Order Structure ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

ABSTRACTThe local structure around Ba atoms in the compound superconductor Y-Ba-Cu-O has been studied by measuring the extended x-ray absorption fine structure (EXAFS) near the Ba K edge. This technique is used to investigate the changes in the short range order structure when the system is doped with impurities.

Studies of short range order structure in the high-Tc superconductor Y-Ba-Cu-O using X-ray absorption techniques

1989 ◽  
Vol 158 (1-3) ◽  
pp. 465-466 ◽  
Author(s):  
A. Krol ◽  
L.Y. Jang ◽  
S.C. Woronick ◽  
F. Xu ◽  
Y.D. Yao ◽  
...  
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Order Structure ◽  
High Tc ◽  
X Ray ◽  
High Tc Superconductor ◽  
X Ray Absorption

Solving the 3D structure of metal nanoparticles

2007 ◽  
Vol 222 (11/2007) ◽  
Author(s):  
Anatoly Frenkel
Keyword(s):  
Metal Nanoparticles ◽  
Short Range ◽  
Short Range Order ◽  
3D Structure ◽  
Three Dimensional ◽  
X Ray ◽  
Particle Distributions ◽  
Structure Of Metal ◽  
X Ray Absorption

We discuss methods of Extended X-ray Absorption Fine-Structure (EXAFS) analysis that provide three-dimensional structural characterization of metal nanoparticles, both mono- and bi-metallic. For the bimetallic alloys, we use short range order measurements to discriminate between random and non-random inter-particle distributions of atoms. We also discuss the application of EXAFS to heterogeneous nanoparticle systems.

VUV- and Soft X-Ray-Induced Optical Luminescence and X-Ray Absorption Fine Structures of Porous Silicon

1992 ◽  
Vol 281 ◽  
Author(s):  
T. K. Sham ◽  
D. T. Jiang ◽  
I. Coulthard ◽  
J. W. Lorimer ◽  
X. H. Feng ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Total Electron Yield ◽  
Total Electron ◽  
X Ray ◽  
Absorption Fine ◽  
Electron Yield ◽  
Optical Luminescence ◽  
Fine Structures ◽  
X Ray Absorption ◽  
Uv Excitation

ABSTRACTOptical luminescence in porous silicon induced by soft X-ray and vacuum UV excitation with energies in the vicinity of the Si K-edge (1838 eV) and the Si L-edge (99 eV) has been observed. The luminescence has been used, together with total electron yield, to record X-ray absorption fine structure (XAFS) in the near-edge region of both Si edges. The near- edge spectra recorded simultaneously with either luminescence or total electron yield were compared, and the implications of these measurements for the structure of porous silicon are discussed.

scholarly journals Investigation of short-range structural order in Zr69.5Cu12Ni11Al7.5and Zr41.5Ti41.5Ni17glasses, using X-ray absorption spectroscopy andab initiomolecular dynamics simulations

2014 ◽  
Vol 21 (6) ◽  
pp. 1296-1304 ◽  
Author(s):  
Debdutta Lahiri ◽  
Surinder M. Sharma ◽  
Ashok K. Verma ◽  
B. Vishwanadh ◽  
G. K. Dey ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Metallic Glasses ◽  
Short Range ◽  
Short Range Order ◽  
Relative Importance ◽  
Chemical Order ◽  
X Ray ◽  
Glass Forming ◽  
Dynamics Simulations ◽  
X Ray Absorption

Short-range order has been investigated in Zr69.5Cu12Ni11Al7.5and Zr41.5Ti41.5Ni17metallic glasses using X-ray absorption spectroscopy andab initiomolecular dynamics simulations. While both of these alloys are good glass formers, there is a difference in their glass-forming abilities (Zr41.5Ti41.5Ni17> Zr69.5Cu12Ni11Al7.5). This difference is explained by inciting the relative importance of strong chemical order, icosahedral content, cluster symmetry and configuration diversity.

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