A powder neutron diffraction study of the magnetic structure of FeV{sub 2}S{sub 4}
- Heriot-Watt Univ., Edinburgh (United Kingdom). Dept. of Chemistry
- Inst. Max von Laue-Paul Langevin, Grenoble (France)
Variable-temperature powder neutron diffraction data demonstrate that FeV{sub 2}S{sub 4} undergoes a transition to a long-range magnetically ordered state at 135(7) K, in agreement with magnetic susceptibility data. High-resolution neutron diffraction data collected at 1.9 K reveal that magnetic ordering results in a doubling of the crystallographic unit-cell dimensions (I2/m a = 5.8303(2), b = 3.2761(1), c = 11.2398(4) {angstrom}, {beta} = 92.046(2){degree}) in the a and c directions and that the magnetic structure is described by a propagation vector of ({1/2}, 0, {1/2}). Cations in an ordered defect layer, 76% of which are Fe(II), possess an average ordered moment of 1.86(5) {mu}{sub B}, which is directed at an angle of 75{degree} to the layer. Cation-cation interactions reduce the average moment of cations in the MS{sub 2} unit to 0.17(4) {mu}{sub B}. The complex magnetic structure involves essentially collinear antiferromagnetic ordering between nearest-neighbor cations.
- OSTI ID:
- 351517
- Journal Information:
- Journal of Solid State Chemistry, Vol. 144, Issue 2; Other Information: PBD: May 1999
- Country of Publication:
- United States
- Language:
- English
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