Crystal structure and magnetic modulation in β−Ce2O2FeSe2

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

doi:10.1103/physrevmaterials.1.034403

Crystal structure and magnetic modulation in β−Ce2O2FeSe2

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

Authors

Chun-Hai Wang

C.M. Ainsworth

S.D. Champion

G.A. Stewart

M.C. Worsdale

Professor Tom Lancaster tom.lancaster@durham.ac.uk
Professor

S.J. Blundell

Helen E.A. Brand

John S.O. Evans

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*.

Citation

Wang, C., Ainsworth, C., Champion, S., Stewart, G., Worsdale, M., Lancaster, T., …Evans, J. S. (2017). Crystal structure and magnetic modulation in β−Ce2O2FeSe2. Physical Review Materials, 1(3), Article 034403. https://doi.org/10.1103/physrevmaterials.1.034403

Journal Article Type	Article
Acceptance Date	Jun 30, 2017
Online Publication Date	Aug 11, 2017
Publication Date	Aug 11, 2017
Deposit Date	Sep 4, 2017
Publicly Available Date	Sep 20, 2017
Journal	Physical Review Materials
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	1
Issue	3
Article Number	034403
DOI	https://doi.org/10.1103/physrevmaterials.1.034403
Public URL	https://durham-repository.worktribe.com/output/1350551
Related Public URLs	https://arxiv.org/abs/1707.01188

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Copyright Statement
Reprinted with permission from the American Physical Society: Wang, Chun-Hai, Ainsworth, C. M., Champion, S. D., Stewart, G. A., Worsdale, M. C., Lancaster, T., Blundell, S. J., Brand, Helen E. A. & Evans, John S. O. (2017). Crystal structure and magnetic modulation in β−Ce2O2FeSe2. Physical Review Materials 1(3): 034403 © 2017 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.