Crystal structure and magnetic modulation in beta-Ce2O2FeSe2

Chun-Hai Wang; C. M. Ainsworth; S. D. Champion; G. A. Stewart; M. C. Worsdale; T. Lancaster; S. J. Blundell; Helen E. A. Brand; John S. O. Evans

doi:10.1103/PhysRevMaterials.1.034403

Crystal structure and magnetic modulation in beta-Ce2O2FeSe2

Materials Science 2017-08-16 v1

Authors: Chun-Hai Wang , C. M. Ainsworth , S. D. Champion , G. A. Stewart , M. C. Worsdale , T. Lancaster , S. J. Blundell , Helen E. A. Brand , John S. O. Evans

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Abstract

We report a combination of X-ray and neutron diffraction studies, Mossbauer spectroscopy and muon spin relaxation (muSR) measurements to probe the structure and magnetic properties of the semiconducting beta-Ce2O2FeSe2 oxychalcogenide. We report a new structural description in space group Pna21 which is consistent with diffraction data and second harmonic generation measurements and reveal an order-disorder transition on one Fe site at TOD ~ 330 K. Susceptibility measurements, Mossbauer and muSR reveal antiferromagnetic ordering below TN = 86 K and more complex short range order above this temperature. 12 K neutron diffraction data reveal a modulated magnetic structure with q = 0.444 bN*.

Keywords

magnetic structure phase transitions frustrated magnetism

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@article{arxiv.1707.01188,
  title  = {Crystal structure and magnetic modulation in beta-Ce2O2FeSe2},
  author = {Chun-Hai Wang and C. M. Ainsworth and S. D. Champion and G. A. Stewart and M. C. Worsdale and T. Lancaster and S. J. Blundell and Helen E. A. Brand and John S. O. Evans},
  journal= {arXiv preprint arXiv:1707.01188},
  year   = {2017}
}

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29 pages

Crystal structure and magnetic modulation in beta-Ce2O2FeSe2

Abstract

Keywords

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