Local structure order around Ni in Hf‒Cu‒Ni glassy ribbons: XANES and EXAFS study at Ni K‒edge

2022 ◽  
pp. 413687
Author(s):  
Akash A. Deshmukh ◽  
Anuj A. Khond ◽  
Jatin G. Bhatt ◽  
Umesh A. Palikundwar
Keyword(s):  
Local Structure ◽  
Exafs Study

Local atomic structure in tetragonal pure ZrO2nanopowders

2010 ◽  
Vol 43 (2) ◽  
pp. 227-236 ◽  
Author(s):  
Leandro M. Acuña ◽  
Diego G. Lamas ◽  
Rodolfo O. Fuentes ◽  
Ismael O. Fábregas ◽  
Márcia C. A. Fantini ◽  
...  
Keyword(s):  
Tetragonal Phase ◽  
Local Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Atomic Structures ◽  
Crystallite Sizes ◽  
Exafs Study ◽  
The Difference ◽  
X Ray Absorption ◽  
Good Agreement

The local atomic structures around the Zr atom of pure (undoped) ZrO2nanopowders with different average crystallite sizes, ranging from 7 to 40 nm, have been investigated. The nanopowders were synthesized by different wet-chemical routes, but all exhibit the high-temperature tetragonal phase stabilized at room temperature, as established by synchrotron radiation X-ray diffraction. The extended X-ray absorption fine structure (EXAFS) technique was applied to analyze the local structure around the Zr atoms. Several authors have studied this system using the EXAFS technique without obtaining a good agreement between crystallographic and EXAFS data. In this work, it is shown that the local structure of ZrO2nanopowders can be described by a model consisting of two oxygen subshells (4 + 4 atoms) with different Zr—O distances, in agreement with those independently determined by X-ray diffraction. However, the EXAFS study shows that the second oxygen subshell exhibits a Debye–Waller (DW) parameter much higher than that of the first oxygen subshell, a result that cannot be explained by the crystallographic model accepted for the tetragonal phase of zirconia-based materials. However, as proposed by other authors, the difference in the DW parameters between the two oxygen subshells around the Zr atoms can be explained by the existence of oxygen displacements perpendicular to thezdirection; these mainly affect the second oxygen subshell because of the directional character of the EXAFS DW parameter, in contradiction to the crystallographic value. It is also established that this model is similar to another model having three oxygen subshells, with a 4 + 2 + 2 distribution of atoms, with only one DW parameter for all oxygen subshells. Both models are in good agreement with the crystal structure determined by X-ray diffraction experiments.

scholarly journals Local structure of the MgxNixCoxCuxZnxO(x=0.2) entropy-stabilized oxide: An EXAFS study

2017 ◽  
Vol 100 (6) ◽  
pp. 2732-2738 ◽  
Author(s):  
Christina M. Rost ◽  
Zsolt Rak ◽  
Donald W. Brenner ◽  
Jon-Paul Maria
Keyword(s):  
Local Structure ◽  
Exafs Study

Local structure in Zn1−xMnxS: EXAFS study

1996 ◽  
Vol 197 (1) ◽  
pp. 7-12 ◽  
Author(s):  
J. Łażewski ◽  
M. Zimnal-Starnawska ◽  
A. Kisiel ◽  
F. Boschbrini ◽  
S. Pascarelli ◽  
...  
Keyword(s):  
Local Structure ◽  
Exafs Study

EXAFS study of the local structure in compounds

1991 ◽  
Vol 8 (4) ◽  
pp. 251-263 ◽  
Author(s):  
C. Levelut ◽  
A. Ramos ◽  
J. Petiau ◽  
M. Robino
Keyword(s):  
Local Structure ◽  
Exafs Study

EXAFS study of the local structure of nanocrystalline FeZrB(Cu) soft magnetic alloys

1996 ◽  
Vol 5 (1) ◽  
pp. 10-14
Author(s):  
Hu Xiao-jun ◽  
Wu Qiu-lin ◽  
Ji Yu ◽  
Man Yi-jun ◽  
Yu Ke ◽  
...  
Keyword(s):  
Local Structure ◽  
Soft Magnetic ◽  
Magnetic Alloys ◽  
Soft Magnetic Alloys ◽  
Exafs Study

EXAFS study of the local structure of InAs up to 80 GPa

2005 ◽  
Vol 17 (12) ◽  
pp. 1811-1824 ◽  
Author(s):  
Giuliana Aquilanti ◽  
Sakura Pascarelli
Keyword(s):  
Local Structure ◽  
Exafs Study

Local structure of ??-sialons: an EXAFS study study

1992 ◽  
Vol 27 (21) ◽  
pp. 5911-5915 ◽  
Author(s):  
J. Sj�berg ◽  
T. Ericsson ◽  
O. Lindqvist
Keyword(s):  
Local Structure ◽  
Exafs Study

EXAFS Study on the Local Structure of Cu in Bi-Pb-Sr-Ca-Cu-O Systems

1990 ◽  
Vol 29 (Part 2, No. 8) ◽  
pp. L1419-L1421 ◽  
Author(s):  
Yasushi Uehara ◽  
Nagao Kamijo ◽  
Hiroyuki Kageyama ◽  
Mitsunobu Wakata
Keyword(s):  
Local Structure ◽  
Exafs Study
Sign in / Sign up

Export Citation Format

Share Document