Magnetic order and phase transition in the iron oxysulfide La2O2Fe2OS2

Abstract

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-Sr2MnO2Sb2-type structure 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 = (0.5 0 0.5) and k = (0 0.5 0.5) and has similarities with related iron oxychalcogenides, illustrating the robust nature of the "2k" magnetic structure.

arXiv commentaccepted for publication in Journal of Magnetism and Magnetic Materials

References in corpus (11)

• Superconductivity of F-substituted LnOBiS2 (Ln = La, Ce, Pr, Nd, Yb) compounds
• Superconductivity induced by La doping in Sr1-xLaxFBiS2 system
• New layered fluorosulfide SrFBiS2
• Low-temperature nuclear and magnetic structures of La2O2Se2.Fe2O from X-ray and neutron diffraction measurements
• Weak spin interactions in Mott insulating La2O2Fe2OSe2
• The magnetic and electronic properties of Oxyselenides - influence of transition metal ions and lanthanides
• Quasi-two-dimensional non-collinear magnetism in the Mott insulator Sr${}_2$F${}_2$Fe${}_2$OS${}_2$
• Mott-Kondo Insulator Behavior in the Iron Oxychalcogenides
• Electronic structure, spin state, and magnetism of the square-lattice Mott insulator La2Co2Se2O3 from first principles
• La${}_2$O${}_3$Fe${}_2$Se${}_2$, a Mott insulator on the brink of orbital-selective metalization
• Crystal field excitations and magnons: their roles in oxyselenides Pr2O2M2OSe2 (M = Mn, Fe)

Cited by in corpus (2)

• Local Structure of Mott Insulating Iron Oxychalcogenides La${}_2$O${}_2$Fe${}_2$O$M$${}_2$ ($M$ = S, Se)
• Chemistry and physics of layered oxychalcogenides containing an anti-cuprate type square lattice