Structural, magnetic, and electronic properties of VxCr 2-x,S3 (0 < x < 2)

T. Erinc Engin, Anthony V. Powell, Steve Hull

Research output: Contribution to journalArticle

Abstract

A new family of vanadium-substituted chromium sulfides (V xCr2-xS3, 0 < x < 2) has been prepared and characterized by powder X-ray and neutron diffraction, SQUID magnetometry, electrical resistivity, and Seebeck coefficient measurements. Vanadium substitution leads to a single-phase region with a rhombohedral Cr 2S3 structure over the composition range 0.0 < x = 0.75, while at higher vanadium contents (1.6 < x = 2.0) a second single-phase region, in which materials adopt a cation-deficient Cr 3S4 structure, is observed. Materials with the Cr 2S3 structure all exhibit semiconducting behavior. However, both transport and magnetic properties indicate an increasing degree of electron derealization with increasing vanadium content in this compositional region. Materials that adopt a Cr3S4-type structure exhibit metallic behavior. Magnetic susceptibility data reveal that all materials undergo a magnetic ordering transition at temperatures in the range 90-118 K. Low-temperature magnetization data suggest that this involves a transition to a ferrimagnetic state. © 2008 American Chemical Society.

Original languageEnglish
Pages (from-to)2039-2048
Number of pages10
JournalChemistry of Materials
Volume20
Issue number5
DOIs
Publication statusPublished - 11 Mar 2008

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Vanadium
Electronic properties
Structural properties
Magnetic properties
Magnetization
Seebeck coefficient
SQUIDs
Sulfides
Chromium
Neutron diffraction
Magnetic susceptibility
Powders
Transport properties
Cations
Substitution reactions
X ray diffraction
Temperature
Electrons
Chemical analysis

Cite this

Engin, T. Erinc ; Powell, Anthony V. ; Hull, Steve. / Structural, magnetic, and electronic properties of VxCr 2-x,S3 (0 < x < 2). In: Chemistry of Materials. 2008 ; Vol. 20, No. 5. pp. 2039-2048.
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Structural, magnetic, and electronic properties of VxCr 2-x,S3 (0 < x < 2). / Engin, T. Erinc; Powell, Anthony V.; Hull, Steve.

In: Chemistry of Materials, Vol. 20, No. 5, 11.03.2008, p. 2039-2048.

Research output: Contribution to journalArticle

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AU - Engin, T. Erinc

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N2 - A new family of vanadium-substituted chromium sulfides (V xCr2-xS3, 0 < x < 2) has been prepared and characterized by powder X-ray and neutron diffraction, SQUID magnetometry, electrical resistivity, and Seebeck coefficient measurements. Vanadium substitution leads to a single-phase region with a rhombohedral Cr 2S3 structure over the composition range 0.0 < x = 0.75, while at higher vanadium contents (1.6 < x = 2.0) a second single-phase region, in which materials adopt a cation-deficient Cr 3S4 structure, is observed. Materials with the Cr 2S3 structure all exhibit semiconducting behavior. However, both transport and magnetic properties indicate an increasing degree of electron derealization with increasing vanadium content in this compositional region. Materials that adopt a Cr3S4-type structure exhibit metallic behavior. Magnetic susceptibility data reveal that all materials undergo a magnetic ordering transition at temperatures in the range 90-118 K. Low-temperature magnetization data suggest that this involves a transition to a ferrimagnetic state. © 2008 American Chemical Society.

AB - A new family of vanadium-substituted chromium sulfides (V xCr2-xS3, 0 < x < 2) has been prepared and characterized by powder X-ray and neutron diffraction, SQUID magnetometry, electrical resistivity, and Seebeck coefficient measurements. Vanadium substitution leads to a single-phase region with a rhombohedral Cr 2S3 structure over the composition range 0.0 < x = 0.75, while at higher vanadium contents (1.6 < x = 2.0) a second single-phase region, in which materials adopt a cation-deficient Cr 3S4 structure, is observed. Materials with the Cr 2S3 structure all exhibit semiconducting behavior. However, both transport and magnetic properties indicate an increasing degree of electron derealization with increasing vanadium content in this compositional region. Materials that adopt a Cr3S4-type structure exhibit metallic behavior. Magnetic susceptibility data reveal that all materials undergo a magnetic ordering transition at temperatures in the range 90-118 K. Low-temperature magnetization data suggest that this involves a transition to a ferrimagnetic state. © 2008 American Chemical Society.

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