Neutron diffraction study of magnetic ordering of the manganese bismuth chloro-sulfide: MnBiS{sub 2}Cl
- Institut des Materiaux Jean Rouxel (IMN), Universite de Nantes, CNRS, 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)
In quaternary compounds of Mn{sup 2+}PnQ{sub 2}X (Pn = Sb, Bi; Q = S, Se; X = Cl, Br, I), Mn atoms in octahedral coordination (4 Q and 2 X) form waved layers separated by Pn atoms. The magnetic structure of the manganese bismuth chloro-sulfide MnBiS{sub 2}Cl has been determined by neutron powder diffraction, revealing a magnetic ordering with an incommensurate wave-vector along b-axis (k = [0, 0.3978, 0]) at 1.6 K. Two modulation models, sinusoidal and helicoidal, give quite equivalent magnetic reliability factors (R{sub mag} = 0.0450 and 0.0481, respectively). The magnetic moment decreases with increasing temperature, to zero at T{sub N} = 32 K. The evolution of the propagation wave-vector shows an irregularity at about 28 K. It could evidence two-phase transitions in agreement with the specific heat measurements. These results are compared to those of manganese antimony chloro-sulfide MnSbS{sub 2}Cl, isotypic with MnBiS{sub 2}Cl.
- OSTI ID:
- 21199722
- Journal Information:
- Materials Research Bulletin, Vol. 44, Issue 4; Other Information: DOI: 10.1016/j.materresbull.2008.09.028; PII: S0025-5408(08)00329-2; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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