title: Structure and Electronic Properties of the Quasi-One-Dimensional Ba2Co1-xZnxS3Series.
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 Ba2CoS3and Ba2ZnS3. The structure of selected compounds with increasing Zn2+content has been analyzed using neutron diffraction, transmission electron microscopy, and extended X-ray absorption fine structure, and the physical properties have been analyzed via magnetic susceptibility and resistivity measurements. The progressive substitution of the nonmagnetic Zn2+cation for Co2+rapidly destroys the antiferromagnetic transition present at 46 K in the quasi-one-dimensional Ba2CoS3, leading to paramagnetic behavior down to the lowest investigated temperature (5 K) for compounds with x > 0.25. For compounds with x ≥ 0.4, a pure Curie-Weiss regime is recovered around 300 K, yielding effective moments consistent with the g factor of the tetrahedrally coordinated Co2+previously determined for Ba2CoS3. The substitution of Zn2+for Co2+also removes the metallic-like behavior of Ba2CoS3, causing an increase in the value of the resistivity with all the Ba2Co1-xZnxS3compounds showing semiconducting behavior. The negative magnetoresistance of Ba2CoS3is improved by the substitution of Zn2+for Co2+, 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 resistivity and magnetoresistance and the content of Zn2+, leading to the hypothesis that transport properties may be linked more closely to extrinsic properties.
authors.affiliation: School of Mathematics and Physical Sciences, G. W. Gray Centre for Advanced Materials, University of Hull , Chemistry Building, Cottingham Road, Hull HU6 7RX, U.K.
authors.forename: Mark R
authors.initials: MR
authors.lastname: Harrison
authors.affiliation: CRISMAT UMR 6508, CNRS-ENSICAEN , 6Bd Marechal Juin, 14050 Caen, France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Maignan
authors.affiliation: CRISMAT UMR 6508, CNRS-ENSICAEN , 6Bd Marechal Juin, 14050 Caen, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Hardy
authors.affiliation: CRISMAT UMR 6508, CNRS-ENSICAEN , 6Bd Marechal Juin, 14050 Caen, France.
authors.forename: Oleg I
authors.initials: OI
authors.lastname: Lebedev
authors.affiliation: School of Mathematics and Physical Sciences, G. W. Gray Centre for Advanced Materials, University of Hull , Chemistry Building, Cottingham Road, Hull HU6 7RX, U.K.
authors.forename: Nigel A
authors.initials: NA
authors.lastname: Young
authors.affiliation: School of Mathematics and Physical Sciences, G. W. Gray Centre for Advanced Materials, University of Hull , Chemistry Building, Cottingham Road, Hull HU6 7RX, U.K.
authors.forename: M Grazia
authors.identifier: http://orcid.org/0000-0002-0124-2197
authors.initials: MG
authors.lastname: Francesconi