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High-pressure neutron-diffraction study of FeS

2000; American Physical Society; Volume: 61; Issue: 17 Linguagem: Inglês

10.1103/physrevb.61.11201

1095-3795

William G. Marshall, R. J. Nelmes, J. S. Loveday, Stefan Klotz, J. M. Besson, G. Hamel, J.B. Parise,

Rare-earth and actinide compounds

Data collected at 4.0 GPa for the MnP-type FeS-II phase show that the transition to this phase is accompanied by a 90\ifmmode^\circ\else\textdegree\fi{} magnetic moment reorientation. Nuclear and magnetic Rietveld refinements show that the observed FeS-II reflection intensities are consistent with a type-I collinear antiferromagnetic structure with moments aligned along the orthorhombic b axis. Neutron data collected for the monoclinic FeS-III phase at 9 GPa support the loss of room-temperature magnetic order.