Structural study of CuCr 1− x V x S 2 disulfide

XAFS was first used to study the changes in the local structure and oxidation state of metal ions in CuCr 1− x V x S 2 (0⩽x<0.25). XANES showed identical monovalent state of Cu 1+and Cr 3+ ions in this family. EXAFS revealed local structure distortions of Cr and Cu as compared to mother CuCrS 2 p...

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Published inNuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 603; no. 1; pp. 188 - 190
Main Authors Vasilyeva, I.G., Kriventsov, V.V.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2009
Subjects
EXAFS
Local structure
Ternary sulphide
XANES
Local structure
XANES
Ternary sulphide
EXAFS
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Summary:XAFS was first used to study the changes in the local structure and oxidation state of metal ions in CuCr 1− x V x S 2 (0⩽x<0.25). XANES showed identical monovalent state of Cu 1+and Cr 3+ ions in this family. EXAFS revealed local structure distortions of Cr and Cu as compared to mother CuCrS 2 provided the V content was minor for Cr and more pronounced for Cu. Analysis of the XAFS data showed that the V ions are partly inserted into unfilled sites of the Cr sublattice, but they are mainly located in non-regular sites, saving slightly the distorted octahedral sulfur nearest surrounding. The vacancies in CrS 2 slabs, the V distribution and the lattice reduction are considered as factors that can modify the magnetic state of the samples.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2009.03.003