Data analysis method to achieve sub-10 pm spatial resolution using extended X-ray absorption fine-structure spectroscopy.
J Synchrotron Radiat
; 21(Pt 4): 756-61, 2014 Jul.
Article
en En
| MEDLINE
| ID: mdl-24971971
ABSTRACT
Obtaining sub-10â
pm spatial resolution by extended X-ray absorption fine structure (EXAFS) spectroscopy is required in many important fields of research, such as lattice distortion studies in colossal magnetic resistance materials, high-temperature superconductivity materials etc. However, based on the existing EXAFS data analysis methods, EXAFS has a spatial resolution limit of π/2Δk which is larger than 0.1â
Å. In this paper a new data analysis method which can easily achieve sub-10â
pm resolution is introduced. Theoretically, the resolution limit of the method is three times better than that normally available. The method is examined by numerical simulation and experimental data. As a demonstration, the LaFe1-xCrxO3 system (x = 0, 1/3, 2/3) is studied and the structural information of FeO6 octahedral distortion as a function of Cr doping is resolved directly from EXAFS, where a resolution better than 0.074â
Å is achieved.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
J Synchrotron Radiat
Asunto de la revista:
RADIOLOGIA
Año:
2014
Tipo del documento:
Article
País de afiliación:
Singapur