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Magnetic order and phase transition in the iron oxysulfide La2O2Fe2OS2

Oogarah, R. K., Suard, Emmanuelle, McCabe, E. E. (2017) Magnetic order and phase transition in the iron oxysulfide La2O2Fe2OS2. Journal of Magnetism and Magnetic Materials, 446 . pp. 101-107. ISSN 0304-8853. (doi:10.1016/j.jmmm.2017.09.024) (KAR id:63360)

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The Mott-insulating iron oxychalcogenides exhibit complex magnetic behaviour and we report here a neutron diffraction investigation into the magnetic ordering in La2O2Fe2OS2. This quaternary oxysulfide adopts the anti-Sr2MnO2Mn2Sb2-type structure (described by space group I4/mmm) and orders antiferromagnetically below TN = 105 K. We consider both its long-range magnetic structure and its magnetic microstructure, and the onset of magnetic order. It adopts the multi-k vector “2k” magnetic structure (k = (½ 0 ½) and k = (0 ½ ½) and has similarities with related iron oxychalcogenides, illustrating the robust nature of the “2k” magnetic structure.

Item Type: Article
DOI/Identification number: 10.1016/j.jmmm.2017.09.024
Uncontrolled keywords: Iron oxychalcogenides; Magnetic structure; Neutron diffraction; Magnetic phase transition
Subjects: Q Science
Divisions: Divisions > Division of Natural Sciences > School of Physical Sciences
Depositing User: Emma McCabe
Date Deposited: 11 Sep 2017 09:21 UTC
Last Modified: 16 Feb 2021 13:48 UTC
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