Two Quaternary Sulfides Rb₂Cu₃FeS₄ and Rb₂Cu₃MnS₄ Magnetic Interactions and Electrical Behavior

Article type: Research Article

Authors: Mouallem-Bahout, M. | Peña, O. | Gaudé, J. | Carel, C. | Ouammou, A. | Nadiri, A.

Affiliations: Cristallochimie et Biomatériaux, UMR 6511, Université de Rennes 1 , CS 74205, 35042 Rennes Cedex, France | Laboratoire Matériaux et Protection de l’Environnement, Faculté des Sciences Dhar Mehraz, Université Sidi Mohamed Ben Abdellah, B. P. 1796 Atlas, Fès, Morocco | Laboratoire de Chimie Minérale Appliquée, B. P. 4010, Faculté des Sciences, Meknès, Morocco

Note: [] Corresponding author. e-mail: [email protected]

Abstract: The two quaternary transition metal chalcogenides Rb2Cu3MS4 (M = Fe, Mn) are based on a common structural pattern consisting of two-dimensional (2D) arrangements of sulfur tetrahedra linked by edges, with the ThCr2Si2-type structure. They are prepared from alkali metal carbonate Rb2CO3 and transition metal oxides CuO, Fe2O3 or MnO by CS2/Ar sulfurization at 850°C ≤ T ≤ 900°C. The magnetic susceptibilities are directly measured as a function of the temperature. Rb2Cu3MnS4 presents a magnetic transition from a high spin (Mn2+) to the low spin state (µeff ≈ 1.5 µB), while the iron analog Rb2Cu3FeS4 orders antiferromagnetically at TN ≈ 6 K under an applied field of one kGauss.

Keywords: Quaternary sulfides, layered structure, magnetic interactions, Néel temperature

DOI: 10.1080/13583140012331339059

Journal: Main Group Chemistry, vol. 3, no. 2, pp. 97-102, 2000