Magnetic study of two isotypic manganese chloro-sulfides: MnSbS{sub 2}Cl and the new compound MnBiS{sub 2}Cl
- Laboratoire de Chimie des Solides, Institut des Materiaux Jean Rouxel, UMR 6502 CNRS-Universite de Nantes, 2 rue de la Houssiniere, BP 32229, 44322 Nantes Cedex 03 (France)
- Laboratoire Leon Brillouin, CEA-CNRS, CEA-Saclay, 91191 Gif-sur-Yvette Cedex (France)
Among the MnPnQ{sub 2}X compounds (Pn: pnictide; Q: chalcogen; X: halogen), two isotypic chloro-sulfides, MnSbS{sub 2}Cl and MnBiS{sub 2}Cl, have been studied. MnBiS{sub 2}Cl is a new compound synthesized by solid state reaction at 500 deg. C. It is orthorhombic, space group Pnma, with a=9.502(2), b=3.8802(8), c=12.305(3)A, V=453.7(2)A{sup 3}, Z=4. Its X-ray single crystal study shows (001) waved layers of MnS{sub 4}Cl{sub 2} octahedra, opposite edge-sharing along b, and corner-sharing along a. Similar magnetic susceptibilities for both compounds have been recorded, indicating high spin Mn{sup 2+} with anti-ferromagnetic exchange. Correlatively, specific heat versus temperature shows a magnetic transition at T{sub N}=35K for the Sb-bearing compound, and a two-steps magnetic transition at 28 and 32K for the Bi isotype. The magnetic structure of MnSbS{sub 2}Cl has been determined by neutron diffraction, revealing a magnetic ordering at 1.5K with an incommensurate wave-vector along b (k=[0, 0.3838, 0]). Two modulation models, sinusoidal and helicoidal, give quite equivalent reliability factors (R{sub mag}=0.0573 and 0.0586, respectively)
- OSTI ID:
- 20784887
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 2; Other Information: DOI: 10.1016/j.jssc.2005.10.045; PII: S0022-4596(05)00509-8; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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