Electrical and Magnetic Properties of New Mixed Transition Metal Sulfides BaKCu3 M S4 ( M =Mn, Co, Ni)
Identifieur interne : 000777 ( Istex/Curation ); précédent : 000776; suivant : 000778Electrical and Magnetic Properties of New Mixed Transition Metal Sulfides BaKCu3 M S4 ( M =Mn, Co, Ni)
Auteurs : M. Mouallem-Bahout [France] ; O. Pe A [France] ; C. Carel [France] ; A. Ouammou [Maroc]Source :
- Journal of Solid State Chemistry [ 0022-4596 ] ; 2001.
English descriptors
Abstract
New transition metal sulfides BaKCu3MS4 (M=Mn, Co, Ni) were prepared from BaCO3, K2CO3, and the corresponding transition metal oxides by CS2/Ar sulfurization. The materials are based on a common structural pattern consisting of 2-D arrangements of MS4 tetrahedra linked by edges, crystallizing in the tetragonal ThCr2Si2-type structure in space group I4/mmm. Electrical resistivity measurements show that the new phases are semiconducting. The temperature dependence of magnetic susceptibility shows different behaviors depending on the substituting transition element: the data for BaKCu3MnS4 can be fitted to the Curie–Weiss equation (μeff=2.50 μB per manganese ion) while magnetic ordering occurs for BaKCu3CoS4 (TN∼12 K). BaKCu3NiS4 exhibits temperature–independent paramagnetic behavior.
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DOI: 10.1006/jssc.2000.9066
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<front><div type="abstract" xml:lang="en">New transition metal sulfides BaKCu3MS4 (M=Mn, Co, Ni) were prepared from BaCO3, K2CO3, and the corresponding transition metal oxides by CS2/Ar sulfurization. The materials are based on a common structural pattern consisting of 2-D arrangements of MS4 tetrahedra linked by edges, crystallizing in the tetragonal ThCr2Si2-type structure in space group I4/mmm. Electrical resistivity measurements show that the new phases are semiconducting. The temperature dependence of magnetic susceptibility shows different behaviors depending on the substituting transition element: the data for BaKCu3MnS4 can be fitted to the Curie–Weiss equation (μeff=2.50 μB per manganese ion) while magnetic ordering occurs for BaKCu3CoS4 (TN∼12 K). BaKCu3NiS4 exhibits temperature–independent paramagnetic behavior.</div>
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