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Neutron diffraction study of the magnetic ordering of jamesonite (FePb4Sb6S14)

2004; Elsevier BV; Volume: 284; Linguagem: Inglês

10.1016/j.jmmm.2004.06.031

1873-4766

P. Léone, G. André, Charlotte Doussier, Yves Moëlo,

Crystal Structures and Properties

Jamesonite, Fe2+Pb4Sb6S14, is a natural sulfide in which Fe octahedra form single chains, that would favor a quasi-one-dimensional magnetism. The susceptibility shows an antiferromagnetic behavior with a broad maximum at 30 K and an irregularity at 5 K. A neutron powder diffraction study has been undertaken between 1.4 and 44 K. In the diffractograms, below 5 K, supplementary peaks of magnetic origin and characteristic of a three-dimensional long-range magnetic ordering appear. The magnetic structure corresponds to a canted antiferromagnet with a propagation wave-vector k=[0.5,0,0] and a magnetic ordered magnetic moment on Fe atoms of 3.3(1) μB at 1.4 K. Below 30 K one-dimensional magnetic ordering or correlations are visible in the diagrams and persist down to 1.4 K.