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

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) muB 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. (C) 2004 Elsevier B.V. All rights reserved.