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Structure and electronic properties of the quasi-one-dimensional Ba₂Co₁₋ₓZnₓS₃ series

Harrison, Mark R.; Maignan, Antoine; Hardy, Vincent; Lebedev, Oleg L.; Young, Nigel A.; Francesconi, M. Grazia

Authors

Mark R. Harrison

Antoine Maignan

Vincent Hardy

Oleg L. Lebedev

Dr Nigel Young N.A.Young@hull.ac.uk
Senior Lecturer/ Director of Studies/ Deputy Head of Chemistry and Biochemistry/ Industrial Placements Coordinator



Abstract

This work focuses on the structure and physical properties of the solid solution Ba₂Co₁₋ₓZnₓS₃ (0 ≤ x ≤ 1), a family of quasi-one-dimensional sulfides with end members Ba₂CoS₃ and Ba₂ZnS₃. The structure of selected compounds with increasing Zn²⁺ content has been analysed using, neutron diffraction, TEM and EXAFS and the physical properties via magnetic susceptibility and resistivity measurements. The progressive substitution of the non-magnetic Zn²⁺ cation for Co²⁺ rapidly destroys the antiferromagnetic transition present at 46 K in the quasi one-dimensional Ba₂CoS₃, leading to paramagnetic behaviour down to the lowest investigated temperature (5K) for compounds with x > 0.25. For compounds with x ≥ 0.4, a pure CW regime is recovered around 300 K, yielding effective moments consistent with the g factor of the tetrahedrally coordinated Co²⁺ previously determined for Ba₂CoS₃. The Zn²⁺/Co²⁺ substitution also removes the metallic-like behaviour of Ba₂CoS₃ causing an increase in the value of the resistivity with all the Ba₂Co₁₋ₓZnₓS₃ compounds showing semiconducting behaviour. The negative magnetoresistance of Ba₂CoS₃ is improved by the Zn²⁺/Co²⁺ substitution, with values of – 6% for Ba₂Co₀.₇₅Zn₀.₂₅S₃, – 9% for Ba₂Co₀.₅Zn₀.₅S₃ and – 8% for Ba₂Co₀.₂₅Zn₀.₇₅S₃. However, there does not seem to be a correlation between the values of the resistivity and the magnetoresistance and the content of Zn²⁺, leading to the hypothesis that transport properties may be linked more closely to extrinsic properties.

Publication Date Jan 3, 2017
Journal Inorganic chemistry
Print ISSN 0020-1669
Electronic ISSN 1520-510X
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 56
Issue 1
Pages 213-223
APA6 Citation Harrison, M. R., Maignan, A., Hardy, V., Lebedev, O. L., Young, N. A., & Francesconi, M. G. (2017). Structure and electronic properties of the quasi-one-dimensional Ba₂Co₁₋ₓZnₓS₃ series. Inorganic chemistry, 56(1), 213-223. https://doi.org/10.1021/acs.inorgchem.6b02014
DOI https://doi.org/10.1021/acs.inorgchem.6b02014
Keywords Neutron diffraction; Ba₂Co₁₋ₓZnₓS₃ series
Publisher URL http://pubs.acs.org/doi/abs/10.1021/acs.inorgchem.6b02014
Copyright Statement This document is the Accepted Manuscript version of a Published Work that appeared in final form in Inorganic chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://dx.doi.org/10.1021/acs.inorgchem.6b02014

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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Inorganic chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://dx.doi.org/10.1021/acs.inorgchem.6b02014






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