English

Magnetic order and phase transition in the iron oxysulfide La2O2Fe2OS2

Strongly Correlated Electrons 2018-03-14 v1
Authors: Reeya K. Oogarah , Emmanuelle Suard , Emma E. McCabe
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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.

Keywords

iron oxysulfide La2O2Fe2OS2 magnetic order neutron diffraction antiferromagnetic Mott insulator multi-k structure

Cite

@article{arxiv.1709.03323,
  title  = {Magnetic order and phase transition in the iron oxysulfide La2O2Fe2OS2},
  author = {Reeya K. Oogarah and Emmanuelle Suard and Emma E. McCabe},
  journal= {arXiv preprint arXiv:1709.03323},
  year   = {2018}
}

Comments

accepted for publication in Journal of Magnetism and Magnetic Materials

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