NDLI: Structural study of CuCr$_{1 − x }$V$_{x}$S$_{2}$ substitutional solid solutions

Content Provider	Springer Nature Link
Author	Vasil’eva, I. G. Kriventsov, V. V.
Copyright Year	2010
Abstract	The local structure and charged state of metal atoms in the CuCrS$_{2}$ matrix and CuCr$_{1 − x }$V$_{x}$S$_{2}$ solid solutions of substitution of vanadium for chromium (0 < x < 0.25) are studied by x-ray absorption spectroscopy (XAFS) using synchrotron radiation. According to XANES spectra (near-edge fine structures), introducing vanadium does not change the charged state of matrix elements and they exist as Cu(1+), Cr(3+), V(3+), and S(2−) in the solid solution. According to EXAFS spectra (extended fine structures), introducing vanadium slightly distorts the local structures of both Cr and Cu atoms (to a greater extent for copper than for chromium). The XAFS analysis data show that vanadium only partially filled vacant positions (specified by the composition of the initial mixture) in the chromium sublattice, the majority of them being located in irregular positions of slightly distorted octahedrons consisting of sulphur atoms. It is shown that the substitution effect leads to deformation (compression) of the lattices of CuCr$_{1 − x }$V$_{x}$S$_{2}$ samples without changing their crystallochemical structures and symmetries, but changes their magnetic structures.
Starting Page	640
Ending Page	644
Page Count	5
File Format	PDF
ISSN	10274510
Journal	Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques
Volume Number	4
Issue Number	4
e-ISSN	18197094
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2010-08-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Surfaces and Interfaces, Thin Films
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Surfaces, Coatings and Films

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